Solve each system of equations using the substitution method
Give the solution in (x,y) form
Step-by-step explanation:
y=-3+5x
substitute y into equation 2
3x-8y=24
3x-8(-3+5x)=24
3x+24-40x=24
x=0
y=-3+5(0)
y=-3
(x,y)=(0,3)
Find the value
of 6y^2 - 24y - 51 when y=-2
Answer:
21
Step-by-step explanation:
6(y^2) - 24y -51 = 6 4 - 24y - 51
(6 4) - (24y) - 51 = 24 - -48 - 51
(24 - -48) - 51 = 72 - 51
72 - 51 = 21
i have to find the value of x please help me will give brainliest to correct answer
Answer:
C. x = 5
Step-by-step explanation:
48 = 7x + 13
-13 -13
35 = 7x
5 = x
Which statement(s) describe perpendicular lines? Choose ALL that apply.
A. Perpendicular lines never meet or cross.
B. Perpendicular lines form a 90 degree angle.
C. Perpendicular lines intersect.
A store owner buys a sweater at $12 and sells it for $15. What was the
percentage of the price increase?
Answer:
it would be a 25% increase.
Step-by-step explanation:
15-12 / 12 * 100 =
3/12 * 100 = 25
Evaluate x2 when x =5
Answer:
10
Step-by-step explanation:
If x=5 then
Plug in the x
(5)2 then multiply
(5)2=10
what is volume of a trapezoid prism?
Answer:
If the prism length is L, trapezoid base width B, trapezoid top width A, and trapezoid height H, then the volume of the prism is given by the four-variable formula: V(L, B, A, H) = LH(A + B)/2. In other words, multiply together the length, height, and average of A and B.
Step-by-step explanation:
Solve for X when......................
Answer:
-2 2
3 0
-1 -5
Step-by-step explanation:
-2 + 0 = -2 -5 + 7 = 2
1 + 2 = 3 0 + 0 = 0
3 + (-4) = -1 - 4 + (-1) = -5
Help I will give brainliest or however it’s spelled
Answer:
uuuummmmmm go to khanacademy but i think 140
Step-by-step explanation:
Determine the common factors and HCF for each of the following terms.
b) 2b, 3b
e) 5bc, 2c2, 3cd
f) 4a2b, 8b2c, 6bcd
Help please and explanation..
Answer:
b) b
e) c
f) 2b
Step-by-step explanation:
you look for numbers that can divide them all at once
One of the legs of a right triangle measures 2 cm and its hypotenuse measures 18 cm.
Find the measure of the other leg. If necessary, round to the nearest tenth.
Answer:
17.9
Step-by-step explanation:
please help i need this rn. no spammers please.
Answer:
x = -6 & y= 42
Step-by-step explanation:
I hope this helps :)
x = 6, y = -42
Substitution:
-7x = -5x - 12
-2x = -12
x = 6
When x = 6,
y = -7(6) = -42
I NEED HELP FAST PLEASE :)
Answer:945
Step-by-step explanation:
If the RADIUS of a circle is 9 meters, then the DIAMETER is? *
25 points
4.5 meters
12 meters
18 meters
27 meters
Slope is -2 and (1,4) What is the equation of the line in point slope form?
Write a story that can be represented by the equation
y=x+ 1x
what fraction in lowest terms represents the valur of c in the equation 3(4x -6) = -3(5 -2x)
Answer:
3(4x - 6) = - 3(5 - 2x)
12x - 18 = - 15 +6x
12x - 6x = - 15 +18
6x = 3
x = 1/2
shawn bought a beautiful house for 350,000. her loan was for 30 years at 6.5% APR. how much money will she
end up paying in interest?
answer:
A.$68,250
B.$682.50
C.$68.25
D.$682,500
Answer:
D
Step-by-step explanation:
I am not sure if my answer is right, this is what I did :-
350,000 x 30 = 10,500,000
10,500,000 x 6.5% = 682,500
Tell me if I was right. Thank you !!
PLEASE HELP
Which of the following are solutions of the equation (2x-3) (3x+5)=-14
Answer:
I love algebra anyways
The ans is in the picture with the steps how i got it
(hope this helps can i plz have brainlist :D hehe)
Step-by-step explanation:
Identify the slope (m) given the equation of the line.
y- 1 = -3(x + 2)
I need help please
Choose the correct simplification of (5xy^7)^2(y^2)^3.
Answer:
25x^2y^20
Step-by-step explanation:
A set of biology exam scores are normally distributed with a mean of 70 points and a standard deviation of six points X equal the score on a randomly selected exam from the set find P(X< 73)
Answer: .69
Step-by-step explanation:
Answer on khan
We can write the value in the range P(64 < {x} < 76) as 0.68.
What is standard deviation?In statistics, the standard deviation is a measure of the amount of variation or dispersion of a set of values.
Given is that a set of biology exam scores are normally distributed with a mean of 70 points and a standard deviation of six points X equal the score on a randomly selected exam from the set.
It is given that -
μ = 70
σ = 6
For the range of {x}, we can write -
(μ - σ) < {x} < (μ + σ)
64 < {x} < 76
We can write the range of {z} value as -
(64 - 70)/6 < {z} < (64 + 70)/6
- 1 < {z} < + 1
Now -
P(64 < {x} < 76) = P(x < 76) - P(x < 64) = 0.84 - 0.15 = 0.68
Therefore, we can write the value in the range P(64 < {x} < 76) as 0.68.
To solve more questions on standard deviation, visit the link below -
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A designer lamp costs £475
It is reduced by 30% in a sale
How much does the lamp now cost?
Answer:
$332.50 is the new discounted price
Step-by-step explanation:
30% of 475
30/100 x $475. 00
= $142.50
$475.00-$142.50=$332.50
and thats the answer
Sandra is buying new carpet for the floors of her house. The cost depends on the area of the floors. Which is the dependent variable, and which is the independent variable?
A. The dependent variable is the cost, and the independent variable is the area of the floors.
B. The dependent variable is the number of walls in the house, and the independent variable is the cost.
C. The dependent variable is the cost, and the independent variable is the number of walls in the house.
D. The dependent variable is the area of the floors, and the independent variable is the cost.
Answer:
A.The dependent variable is the cost, and the independent variable is the area of the floors.
Step-by-step explanation:
Because I had a quiz with the same question and got it right, and because the paragraph says "The cost depends on the area of the floors."
Answer:
A.
Step-by-step explanation:
"The cost depends on the area of the floors"
The independent variable is the cause and the dependent variable is the effect. Took the test.
The height, h, of an object that is projected straight downward from a ledge 500 feet above the ground with initial velocity 10 feet per second is given by the equation h = 500 - 10t - 16t^2 where t = time in seconds. After how many seconds will the object be 100 feet above the ground?
A. 2.21 seconds
B. 3.85 seconds
C. 4.70 seconds
D. 40 seconds
A triangular prism has a base edges 2cm, 4cm, and 5cm long. It’s lateral area is 231cm . What is the height of the prism
Answer:
For your specific problem, h = 300 / (4 + 5 + 6) = 300 / 15 = 20
I need help this is extremely hard
Answer:
what variable do you want to find?
Step-by-step explanation:
Work out (5.32 x 10^-7): (2.5 x 10^-5)
Give your answer in standard form
Answer:
1.33×10^-6
Step-by-step explanation:
5.32 x 10^-7= 5.32×10^(-5-2)= 5.32×10^-2×10^(-5)
=0.0532×10^-5
(0.0532×10^-5) (2.5 x 10^-5)
0.0532×2.5 × 10^-5
0.133×10^-5= 1.33×10^-1 ×10^-5
1.33×10^-6
0.02128 is the standard form of 5.32 x 10⁻⁷/2.5 x 10⁻⁵
What is Number system?A number system is defined as a system of writing to express numbers.
The given fraction is 5.32 x 10⁻⁷/2.5 x 10⁻⁵
Simplify using exponent rule with same base
[tex]a^{m} a^{n} =a^{m+n}[/tex]
Now 5.32/2.5×10⁻⁷×10⁵
5.32/2.5×10⁻⁷⁺⁵
Calculate the sum or difference
5.32/2.5×10⁻²
Convert fraction into decimal
2.128×10⁻²
Express in standard form 0.02128
Hence, 0.02128 is the standard form of 5.32 x 10⁻⁷/2.5 x 10⁻⁵
To learn more on Number system click:
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what's the answer to 9 x (-6)=
Answer:
-54
Step-by-step explanation:
a positive times a negative is a negative always
Answer:
Answer: -54
Multiply them and add a negative symbol
Sam wants a television.He can either buy or rent it.The cost of buying it is $960.Sam would pay a deposit of 30% followed by 12 equal month after payments.
1)Calculate the deposit. 2)Calculate each monthly payment.
Answer:
1. deposit = $288
2. monthly payments = $56
Step-by-step explanation:
960 x 0.3 = 288
960 - 288 = 672
672/12 = 56
