x/2+4x=2 pls send a good explanation
maths grade 8 cbse...
The value of the expression is 5.
What is order of operations?
The order of operations is a rule that specifies the correct sequence of steps to be taken when evaluating a mathematical equation.
To simplify this expression, we need to follow the order of operations, which is:
Exponents (powers, roots)
Multiplication and Division (from left to right)
Addition and Subtraction (from left to right)
So, we start with the exponents:
[tex]3^0+4^{-1} \\= 1 + 1/4 \\= 5/4[/tex]
Now we substitute this value back into the original expression:
[tex](3^0+4^{-1} )*2^2\\ = (5/4) * 2^2 \\= (5/4) * 4 \\= 5[/tex]
Therefore, the value of the expression is 5.
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what is the correct decision in a hypothesis if the data produce a t-statistic that is in the critical region?
The correct decision in a hypothesis test when the data produces a t-statistic that is in the critical region is to reject the null hypothesis.
This is because a t-statics in the critical region indicates that the differences between the sample mean and the population mean are statistically significant. This means that the data indicates that the null hypothesis is wrong and that the alternative hypothesis is true. In a hypothesis test, the null hypothesis is what the researcher is trying to disprove. It is the general statement that suggests that there is no difference between the sample mean and the population mean. The alternative hypothesis is what the researcher is attempting to prove. It suggests that there is a difference between the sample mean and the population mean. Therefore, when the data produces a t-statistic that is in the critical region, it indicates that the alternative hypothesis is true. When a t-statistic is in the critical region, it means that the result is statistically significant. This means that the differences between the sample mean and the population mean are unlikely to have occurred by chance and that the alternative hypothesis is likely to be true. Therefore, when the data produces a t-statistic that is in the critical region, the correct decision is to reject the null hypothesis and accept the alternative hypothesis.
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Dena cuts wood for a treehouse. She has 5 pieces of wood left over with the following lengths in centimeters: 12.7, 26 3/10, 15 4/5, 21 1/4, and 19.2.
A. Write and evaluate an expression to find the total length of wood left over.
______________________________________________________________
B. Dena wants to make a birdhouse with the leftover wood. She needs 105 3/5 centimeters of wood for the birdhouse. Write and evaluate an expression to determine how much more wood will be needed.
______________________________________________________________
solve the right triangle by completing the table below :) help asap
The missing sides of the two right triangles are B ≈ 75.5, b ≈ 10.7 and a ≈ 6.9.
How to find the missing sides of a system formed by two similar right triangles
In this problem we find two similar right triangles. Two triangles are similar when they have congruent angles and sides that are not congruent but proportional. Sides in right triangles are related each other by means of Pythagorean theorem:
r² = x² + y²
Where:
r - Hypotenusex, y - LegsAccording to the statement, we need to use the following relationships:
B = √(C² - A²)
a / A = b / B = c / C
If we know that A = 49, C = 90 and c = 12.7, then the lengths of missing sides are:
B = √(90² - 49²)
B = √5699 (approx. 75.5)
b = B × (c / C)
b = √5699 × (12.7 / 90)
b = 127√5699 / 900 (approx. 10.7)
a = A × (c / C)
a = 49 × (12.7 / 90)
a = 6233 / 900 (approx. 6.9)
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Can Someone tell me the answer for this one pleas:
Determine which integers in the set S:{−4, 4, 6, 21} make the inequality 3(j − 5) > 3(7 − 2j) true.
S:{6, 21}
S:{4, 21}
S:{−4, 6}
S:{−4, 4}
The integers 6,21 from the set will make the inequality 3(j-5)>3(7-2j) true.
An inequality response is defined?
An expression in mathematics where the sides are not equal is referred to as being inequal. A comparison of any two values, known as an inequality, demonstrates that one value is less than, larger than, or equal to the value on the opposite side of the equation.
The given inequality is 3(j-5)>3(7-2j). The given set is S:{−4, 4, 6, 21}.
First, we will simplify the given inequality.
3(j-5)>3(7-2j)
⇒j-5>7-2j
⇒3j>12
⇒j>4
It means that numbers greater than 4 will satisfy the given inequality.
Numbers greater than 4 in the given set are 6,21.
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which statement justifies step three? Which statement justifies step four?
Given: AB=AD;BC=DC
Prove:
The two statements that justifies step three and four in the congruency proof are;
Reason 3: SSS Congruency Postulate
Reason 4: CPCTC (Corresponding Parts of Congruent Triangles are Congruent)
How to Identify the Congruency Proof?The two column proof is as follows;
Statement 1: AB ≅ AD, BC ≅ DC
Reason 1: Given
Statement 2: AC ≅ AC
Reason 2: Reflexive Property of Congruence
Statement 3: ΔABC ≅ ΔADC
Reason 3: SSS Congruency Postulate
Statement 4: ∠ABC ≅ ∠ADC
Reason 4: CPCTC (Corresponding Parts of Congruent Triangles are Congruent)
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5x-2=2x+15
5x-2x=15+2
3x=17
Answer:
[tex]x = \frac{17}{3} = 5\frac23 = 5.\overline6[/tex].
Step-by-step explanation:
No idea what your question is, but [tex]x = \frac{17}{3} = {5\frac23} = 5.\overline{6}[/tex].
Andre luke and shemai had 1400 marbles. If andre had 200 fewer than luke and twice as many as shemai. How many did luke receive
Luke received a total of 640 marbles from the total of 1400 marbles that Luke, Andre and Shema had combined.
Luke, Shemai and Andre combined has 1400 marbles. Andre has 200 fewer than Luke and twice as many as Shemia.
Now, let us say that Luke had X marbles then Andre will have X-200 marble and Shemai will have X/2 marbles.
Now, all the marbles combined will be equal to 1400, so, the simple algebraic relation will be,
X + X-200 +X/2 = 1400
X+X+X/2 = 1600
5X/ = 3200
X = 640
So, Luke will have a total of 640 marble while Andre and Shemai will have 440 and 320 marbles each.
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How many times dose 6 go into 18
Answer:
3 times
Step-by-step explanation:
6 x 3 = 18
Answer:
3
Step-by-step explanation:
18/6 = 3
or
6 + 6 + 6 = 18
Dr. Grumman got his first job in 2020. In that year, the government took out 6.2% of a person's
income for Social Security, until a person made $137,700. If Dr. Grumman earned $141,340 in
2020, how much did he pay to Social Security?
The amount paid to social security when Dr. Grumman earned $141,340 in 2020 is $8763.08.
What are percentages?A % in mathematics is a quantity or ratio that is stated as a fraction of 100 (from the Latin per centum, "by a hundred"). Although the abbreviations "pct.", "pct.", and occasionally "pc" are also used, the percent symbol, "%," is frequently used to indicate it.
We must divide the value by the entire value to find the percentage, and then multiply the resulting number by 100.
Formula for percentages: (Value/Total value) * 100
Dr. Grumman earned $141,340 in 2020.
The social security he paid is:
(141340)(6.2/100) = 8763.08
Hence, the amount paid to social security when Dr. Grumman earned $141,340 in 2020 is $8763.08.
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What is the equation of the line that passes through the point (4,1) and (8, -4)?
Answer:
y= -5/4x+
Step-by-step explanation:
find the gradient first ∆y/∆5x
-4-1/ 8-4
=-5/4
assume one of the points to be x, y
y-1/ x-4 =-5/4
cross multiply
4y-4=-5x+20
4y= -5x+20+4
divide both sides by 4
y= -5/4x+
Determine the solution to the system of equations represented by the tables below.
-3 -2
-1 0
6
4
2 0
X
f(x)
X
g(x)
-2
7
-1
2
0 1
-3-8
Answer:
(-1, 2)
Step-by-step explanation:
The solution to a system of equation will always intersect on a graph, which means that at a certain point, they will have the same x and y coordinate.
As we can see from the table, for both f(x) and g(x) when x = -1, y = 2, which is the intersection point.
A chemist has 20% and 50% solutions of acid available. How many liters of each solution should be mixed to obtain 180 liters of 22% acid solution?
Answer:
22% = 163.63636364 litres.
50% = 409.090909 litres
Step-by-step explanation:
when 22% acid solutions = 180 litres
then 20% acid solutions = ?
therefore =
[tex] = \frac{20}{22} \times 180 \\ = \frac{3600}{22} \\ = 163.63636364.litres[/tex]
Also when 22% acid solutions = 180 litres
then 50% acid solutions = ?
therefore
[tex] = \frac{50}{22} \times 180 \\ = \frac{9000}{22} \\ = 409.090909.litres[/tex]
therefore 22% = 163.63636364 litres.
50% = 409.090909 litres.
The difference between a two-digit number and the reverse of the number is 18. What could the original number be if the reversed number is also a two-digit number? List all possibilities.
pls answer by sunday february 12, 12:00 p.m. , pacific standard time!
Answer:
27, 36
Explanation:
To find the possible two-digit numbers that meet the criteria, we can use algebra. Let x be the original two-digit number, and let y be the reverse of x. Then, we have:
x - y = 18
We can also write y in terms of x:
y = x % 10 * 10 + x / 10
Substituting the expression for y into the equation x - y = 18, we get:
x - (x % 10 * 10 + x / 10) = 18
Expanding and simplifying the right side of the equation, we get:
9x = 180 + 10
Dividing both sides of the equation by 9, we get:
x = 20
Since x must be a two-digit number, 20 is not a valid solution. However, we can check the two numbers that are close to 20, which are 18 and 21.
For x = 18, we have y = 81, which is a two-digit number, so 18 is a valid solution.
For x = 21, we have y = 12, which is a two-digit number, so 21 is also a valid solution.
Therefore, the possible two-digit numbers that meet the criteria are 27 and 36.
Find the measures of each interior angles of a regular polygon having 15 sides
The measure of each interior angle of a regular polygon having 15 sides is equal to option B: 156°.
A polygon is an enclosed figure composed of more than three straight lines. To find the measure of each interior angle of a regular polygon having n sides, we would first find the total sum of interior angles of this polygon. The formula is:
(n-2) × 180°
= (15-2) × 180°
= 13 × 180°
= 2340°
We, here, found that the sum of all interior angles of a regular polygon having 15 sides is equivalent to 2340°. Now, to find the measure of each angle, we can divide this sum by the number of sides as:
2340/15 = 156°.
Therefore, the measure of each angle of a regular polygon having 15 sides is equivalent to 156°.
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Complete question is:
Find the measures of each interior angles of a regular polygon having 15 sides.
A. 106°
B. 156°
C. 206°
D. 256°
What are the coordinates of the center in the measure of the radius for a circle whose equation is (x-10)^2+(y-3)^2=36
Answer:
Center is (10, 3)
Radius = 6
Step-by-step explanation:
The standard equation of a circle is
(x - a)² + (y - b)² = r²
where
(a, b) is the center of the circle and
r is the radius
Comparing (x - 10)² + (y - 3)² = 36
it is easy to see that a = 10, b = 3 and r =√36 = 6
So center is(10, 3) and radius is 6
4) Write 5√5 + √20 in the form a√5
5) Write √5 x √8 in the form b√10
6) Write √600-√24 in the form a√6
Answer:
4) 7 SqrRt( 5 )
5) 2 SqrRt( 10 )
6) 8 SqrRt( 6 )
What point lies on the line with a slope of m=2/3 that passes through the point (-3,-2)?
PLEASE SHOW WORK
Answer: y = 2/3x
Step-by-step explanation:
This is pretty easy too
the equation for a line is: y = mx + b, where m is the slope and b is the y intercept
y = 2/3x + b, where we need to find b
substituting the point we are given:
-2 = 2/3(-3) + b
-2 = -2 + b
0 = b
so our line is simply:
y = 2/3x
Question 3 of 10
The function a(b) relates the area of a trapezoid with a given height of 14 and
one base length of 5 with the length of its other base.
It takes as input the other base value, and returns as output the area of the
trapezoid.
a(b)=14. D+5
2
Which equation below represents the inverse function b(a), which takes the
trapezoid's area as input and returns as output the length of the other base?
O A. b(a)=+7
B. b(a)--7
O C. b(a)- +5
OD. b(a)-2-5
Note that the function takes the trapezoid's area as input and returns as output the length of the other base is A(x)/7-5=x.
What is the area of a Trapezoid?Recall that the function for the trapezoid area is:
A(x)=(B+b)*h/2
where
B and b are the bases and
h is the height.
Thus, given a height of 14 and one base length of 5 with the length of its other base
With the given data: h=14 B and b =5 and x (it may vary which one is bigger)
So that function becomes:
A(x)=(5+x) * 14/2
A(x)=(5+x)*7
So if you want the inverse function, you have to operate to find x:
A(x)/7=5+x
A(x)/7-5=x
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Reeta has spent 2/7 of her salary on car repair work. She has 15. 000 rupees left with her. What is her salary?
As per unitary method, Reeta's salary is 21,000 rupees.
The unitary method is a technique of solving problems by assuming a unit value and then finding out the required value in terms of that unit.
In this problem, we can assume Reeta's salary to be the unit value and then find out how much she spent on car repair work and how much money she has left using this unit value.
Let's assume Reeta's salary to be x rupees. Now, according to the problem, she has spent 2/7 of her salary on car repair work. So, the amount of money she spent on car repair work can be calculated as:
2/7 * x
Using the unitary method, we can now find out how much money she has left with her. We know that she has 15,000 rupees left. So, we can set up the following proportion:
2/7 * x = x - 15,000
Simplifying this equation, we get:
2x = 7(x - 15,000)
2x = 7x - 105,000
5x = 105,000
x = 21,000
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(x + 1) /x³ − 3x² + 6x +11.
The polynomial expression cannot be divided
How to divide the polynomial expressionFrom the question, we have the following parameters that can be used in our computation:
(x + 1) /x³ − 3x² + 6x +11.
The degree of the numerator is 1
While the degree of the denominator is 3
For a polynomial quotient to be evaluated, the degree of the numerator must be greater than the degree of the denominator
Because 1 is less than 3, then the polynomial expression cannot be divided
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What is the solution set to the inequality w+ 4<4 (w - 2)?
Select a ray. Move the point on the ray to the correct place on the number line.
-7 -6 -5 -4
H
->
(-)
-3 -2 -1
0 1 2
--
31
3
4 5 6 7
--
+
The solution set to the inequality is w > 3
How to determine the solution to the inequalityFrom the question, we have the following parameters that can be used in our computation:
w+ 4<4 (w - 2)
Open the bracket
So, we have the following representation
w+ 4 < 4w - 8
Evaluate the like terms
So, we have the following representation
12 < 3w
Divide by 3
4 < w
So, we have
w > 4
See attachment for number line
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You’ve saved $45, which is 70% of the amount you want to save. What is the total amount you want to save? (round to nearest cent) * *
Rounding this to the nearest cent, the total amount that was wanted to be saved is $64.29.
To solve this problem, we can set up a proportion using the given information. Let x be the total amount that was wanted to be saved.
We know that the amount saved ($45) is 70% of the total amount that was wanted to be saved. Therefore, we can write:
45 = 0.7x
To solve for x, we can divide both sides by 0.7:
x = 45 ÷ 0.7
x = 64.28571429
The answer to the problem is $64.29, rounded to the nearest cent. This means that the total amount that was wanted to be saved was $64.29, and 70% of this amount is equal to the amount that was actually saved ($45). To check our work, we can multiply 64.29 by 0.7 to see if it equals 45. When we do this, we get:
64.29 x 0.7 = 45.003, which rounds to $45, so our answer is correct.
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15.
Mrs Dixon puts 230 eggs into boxes.
Each box holds 12 eggs.
How many egg boxes does Mrs Dixon need to put all the eggs into boxes?
Answer:
20 boxes
Step-by-step explanation:
Each box ca hold 12 eggs
There are 230 eggs
So you will need 230/12 = 19 1/6 boxes = 19.167 boxes
Since you cannot get less than 1 box, round up to 20 boxes. There will be some empty spaces in one of the boxes
what is 2+4x6 in math and english
Answer:
Step-by-step explanation:
4 x 6= 24
24+2=26
Solve for x. Round to the nearest tenth,if necessary.
The value of x is approximately 0.8 cm when rounded to the nearest tenth.
Describe Triangle?A triangle is a two-dimensional geometric shape that has three sides and three angles. It is the simplest polygon and is a fundamental building block in many areas of mathematics and science.
The three sides of a triangle can have different lengths and can be of different types, such as equilateral, isosceles, or scalene. An equilateral triangle has three sides of equal length, while an isosceles triangle has two sides of equal length and a third side of a different length. A scalene triangle has all three sides of different lengths.
In a right triangle, the sine of an angle is defined as the ratio of the length of the side opposite the angle to the length of the hypotenuse. Thus, we have:
sin(IHJ) = IJ/IH
Taking the sine of both sides and substituting the given values, we get:
sin(23°) = x/2
Multiplying both sides by 2, we have:
x = 2*sin(23°)
Using a calculator, we get:
x ≈ 0.83
Therefore, the value of x is approximately 0.8 cm when rounded to the nearest tenth.
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On a hot summer day, Brad and his friends decided to have a water fight. They threw water balloons for 33 minutes. When all the water balloons were gone, they sprayed water with hoses for 32 minutes. The water fight ended at 4:28 P.M. when Brad's dad showed up with ice cream. What time did the water fight start?
Answer:
3:23
Step-by-step explanation:
The water fight ended at 4:28 and lasted for 32 minutes so
4:28 - 32 minutes = 3:56
3:56 - 33 minutes = 3:23
Find X then find angle NK
Using the two tangent exterior angle theorem:
x = 6
m(NK) = 153°
How to Apply the two tangent exterior angle theorem?According to the two tangent exterior angle theorem, when you draw two tangent lines from a point outside a circle, the angle formed between them is equal to half the difference between the measures of the arcs they intercept inside the circle.
Therefore, using the above theorem, we have:
7x + 6 = 1/2[(25x + 3) - (9x + 3)]
Solve for x:
2(7x + 6) = 25x + 3 - 9x - 3
14x + 12 = 16x
14x - 16x = -12
-2x = -12
x = -12/-2
x = 6
m(NK) = 25x + 3 = 25(6) + 3
m(NK) = 153°
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You teach an arts and crafts class at your local library. There are 12 girls and 11 boys registered for the class. You
need to purchase supplies that will cost $5 per student.
How much will it cost to purchase the supplies?
$28
$67
$71
$115
$192
Answer:
$115
Step-by-step explanation:
12 + 11 = 23
There are 23 students in the class.
Cost of supplies: $5 per student.
total cost = 23 × $5 = $115
The total cost to purchase the supplies is,
⇒ $115
What is mean by Addition?The process of combining two or more numbers is called the Addition. The 4 main properties of addition are commutative, associative, distributive, and additive identity.
Given that;
There are 12 girls and 11 boys registered for the class.
And, You need to purchase supplies that will cost $5 per student.
Here, Total students = 12 + 11 = 23
Hence, The total cost to purchase the supplies is,
⇒ 23 x $5
⇒ $115
Thus, The total cost to purchase the supplies is,
⇒ $115
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