A bag contains 21 coins consisting of nickles and dimes. The total value of the coins is $1.70.
Write a system of equations that models this situation. How many nickels are in the bag?
Answer:
8
Step-by-step explanation:
x = nickles
y = dimes
0.05x + 0.10y = 1.70
x + y = 21
y = 21 - x
0.05x + 0.10 (21 - x) = 1.70
0.05x - 0.10x + 2.10 = 1.70
-0.05x + 2.10 = 1.70
-0.05x = -0.40
x = 8
There are 18 girls in Mr. Brimley's math class. If 40% of the students are girls, what is the best estimation for the number of boys in the class?
Answer:
27 boiz
Step-by-step explanation:
Pablo uses 13.5 cups of flour to make 6 batches of muffins. How many cups of flour did he use per batch?
hi I need help with this question
Answer:
Use your calculator to find the value of:

Write all the figures on your calculator's display for th
18 is 75% of what number?
Answer:
24
Step-by-step explanation:
18 * 4 /3 = 72/3 = 24
Which number is not an integer? Select all that apply.
1.33
a.
b. -7
c.
d. 4
e. O
f. -1.63
Answer:
A and 1.33 and -1.63
Step-by-step explanation:
A integer is a whole number, it's either positive or negative.
45/g = 5/1
What's the answer for g
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Answer: The answer is A
Step-by-step explanation:
1/2p+75=100
1p/2+75=100
Multiply by 1
3
Subtract
7
5
75 from both sides of the equation
4).
Simplify
5).
Multiply all terms by the same value to eliminate fraction denominators
6).
Simplify
Can u plz mark me branliest plz.
Answer:
p = 50
Step-by-step explanation:
[tex]\frac{1}{2} *p+75=100\\[/tex]
Combine like terms into a single fraction:
[tex]\frac{1}{2} p+75=100[/tex]
[tex]\frac{1p}{2} +75=100[/tex]
Multiply by 1:
[tex]\frac{1p}{2}+75=100[/tex]
[tex]\frac{p}{2} +75=100[/tex]
Subtract 75 from both sides of the equation:
[tex]\frac{p}{2} +75=100[/tex]
[tex]\frac{p}{2} +75-75=100-75[/tex]
Simplify:
Subtract the numbers:
[tex]\frac{p}{2} +75-75=100-75[/tex]
[tex]\frac{p}{2} =100-75[/tex]
Subtract the numbers:
[tex]\frac{p}{2} =100-75[/tex]
[tex]\frac{p}{2} =25[/tex]
Multiply all terms by the same value to eliminate fraction denominators:
[tex]\frac{p}{2} =25[/tex]
[tex]2*\frac{p}{2} =2*25[/tex]
Simplify:
[tex]2*\frac{p}{2} =2*25[/tex]
[tex]p=2*25[/tex]
Multiply the numbers:
[tex]p=2*25[/tex]
[tex]p=50[/tex]
Solution:
[tex]p=50[/tex]
Find the exact height of the isosceles triangle.
Please help me on this question I’m stuck:(
The accompanying graph represents the yearly cost of playing 0 to 5 games of golf at the Shadybrook Golf Course. What is the total cost of joining the club and playing 10 games during the
year?
Answer:
$390
Step-by-step explanation:
y=30x+90
y+30(10)+90
y=300+90
$390 is the total cost of joining the club and playing 10 games during the
year
What is algebraic expression?An algebraic expression in mathematics is an expression which is made up of variables and constants, along with algebraic operations (addition, subtraction, etc.). Expressions are made up of terms.
Given
y=30x+90
y+30(10)+90
y=300+90
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On a blueprint, the diagram of a building has a height of 25 cm.
The height of the building is x times the height of the diagram.
Which equation represents the height, h, of the building?
h = 25 : x
B
x = 25h
h = 25 + x
h = 25x
Answer:
h = 25x
Step-by-step explanation:
Given the following
height of building = h
height of diagram = 25cm
If the height of the building is x times the height of the diagram, then;
h = x * 25
h = 25x
Hence the required equation is h = 25x
Solve for r when
- 5 = – 4
-
20
r=
What is r?
Answer:
r is 19
Step-by-step explanation:
-4 - 20 = -24
-24 - r = -5
r = 19
Answer:
r=1/20
Step-by-step explanation:
-5=-4-20r (+4 both sides)
-1=-20r (times -1 both sides)
1=20r (divide by 20)
1/20=r
This is easy but hard for me can someone help me ASAP please
Answer:
u have them all selected
Step-by-step explanation: but i thnk the answer is -3 and -1
the bakers at noah's bagels can make 340 bagels in 4 hours so how many can they make in 10 hours ?
Answer:
850 bagels in 10 hours.
Step-by-step explanation:
340 divided by 4 is 85. 85 times 10 is 850. So, 850 bagels.
SOMEONE HELP pslslspsls
Answer:
4
Step-by-step explanation:
Please explain...
y=3x^2-5x+1 solve by completing the square
Answer:
x=5+√136or x=5−√136
Step-by-step explanation:
To solve this equation we have to factorize 3x2−5x+1. Since we can not use any
If 12m of carpet costs €516, find the cost of 16m
Step-by-step explanation:
Cost of 12m carpet = €516
cost of 1 m carpet = €516/ 12 = € 43
Now
cost of 16m carpet = € 43 * 16 = € 688
[tex]hope \: it \will \: help \: u[/tex]
I need help fast plz
Answer:
what do you need help with
Item 5
Graph y = −x/3 + 4.
Answer:
Just use desmos graphing
Edit: I did it on desmos, here's a screenshot
The inequality graphed below represents the ages, a, of players on a baseball team.
Seth sold 12 glasses of lemonade yesterday. Today Seth sold 25% more glasses of lemonade than yesterday. How many more glasses did Seth sell today?
Answer:
15
Step-by-step explanation:
If he sold 12 glasses of lemonade yesterday then 25% more is 1/4 more. 1/4 of 12 is 3. Add 3 to 12 and you get 15.
What is the mean of the data set?
47, 25, 43, 33
Answer:
The mean is 47
Step-by-step explanation:
First, you want to add up all of the numbers.
47 + 25 + 43 + 33 = 148
Now, you want to divide what you got by how many numbers there are.
148/4 = 37
The mean is 47
Mean of the terms given in the data set as {47, 25, 43, 33} (four terms) will be 37.
Calculations for the mean of a data set: Mean of the terms given in a data set is represented by the avarage of the terms.
Mean = [tex]\frac{\text{Total of the terms in a data set}}{\text{Numbers of the terms}}[/tex]
Total of the terms given in the the data set = 47 + 25 + 43 + 33
= 148
Number of terms in the data set = 4
Substitute these values in the expression of the mean,
Mean = [tex]\frac{148}{4}[/tex]
= 37
Therefore, mean of the data set given in the question is 37.
Learn more about the mean of a data set here,
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Given that a = 6 cm and b = 5 cm,
work out the height of the triangle.
The height of the triangle is 4 cm if the a = 6 cm and b = 5 cm and applying Pythagoras theorem.
What is the Pythagoras theorem?The square of the hypotenuse in a right-angled triangle is equal to the sum of the squares of the other two sides.
The question is incomplete.
The complete question is in the picture, please refer to the attached picture.
We can draw a right angle triangle to find the hieght of the triangle.
Applying Pythagoras theorem.
Let h be the height:
b² = (a/2)² + h²
5² = (6/2)² + h²
5² = (3)² + h²
h = 4 cm
Thus, the height of the triangle is 4 cm if the a = 6 cm and b = 5 cm and applying Pythagoras theorem.
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70 students per 2 teachers. How many students per teacher?
Answer:
35 students per teacher
Step-by-step explanation:
Answer:
35 students per teacher
Step-by-step explanation:
Divide 70 and 2
70/2=35
7. Two friends worked out on treadmills at the gym. Laura walked 7 miles in
1.75 hours. Ricki walked 12 miles in 2 hours. How much faster did Ricki
walk? *
0.25 mile per hour faster
2 miles per hour faster
They walked the same speed.
He didn't, Leo walked faster.
Answer:
Step-by-step explanation:
Laura walked 7/1.75=4 miles per hour
Ricky walked 12/2=6 miles per hour
Ricki is 2 miles per hour faster
Which rule describes the composition of transformations that maps figure ABCDE to figure A" B" C" D" E"?
Answer:
It would be the fourth choice.
Step-by-step explanation:
To get ABCDE to A'B'C'D'E', you need to reflect the shape across line M. Then to go from A'B'C'D'E' to A''B''C''D''E'', you need to rotate about point C 180⁰.
It was first reflected across the x axis which would be line m. And since point c is the same place for the two bottom images , after the reflection it was rotated on point c.
The answer should be the 4th choice
Soybeans have a conversion factor of 36.744 (bu/t). How much do 45 bushels weigh?
Answer:
the weight of 45 bushels is 1.22
Step-by-step explanation:
The computation is shown below:
As the soybeans has the conversion factor of 36.744
So the weight of 45 bushels be
= 45 ÷ 36.744
= 1.22
hence, the weight of 45 bushels is 1.22
what will the equation be for this "Ryan is saving money to buy a skateboard that costs $85. He has already saved $40. He plans to save the same amount each week for three weeks. Let "x" represent the amount he saves each week. Write and solve an equation to represent this situation."
Answer:
weir
Step-by-step explanation:
good at math & need points? help!!
Answer:
D
Step-by-step explanation:
Which equation matches the graph?
Answer:
A.
Step-by-step explanation:
The Y-intercept is 3 so C and D are automatically are wrong because their Y intercept is 2.
The slope is 2x because you count the points that the line goes through.
For example: From (-1,1) count up and right until you get another point,
count using [tex]\frac{Rise}{Run}[/tex] the rise of this equation is 2 and the run is 1 so [tex]\frac{2}{1} = 2\\[/tex]
Rise = Vertical
Run = Horizontal
Because the slope is increasing the slope is positive meaning B is incorrect because it's slope is negative.
Hope this was clear and helped you out!
The equation that matches the graph is y = -2x + 3
A linear equation is in the form:
y = mx + b;
where y, x are variables, m is the slope of the line and b is the y intercept
The line passes through the point (0, 3) and (-1.5, 0). Hence:
[tex]y-y_1=\frac{y_2-y_1}{x_2-x_1} (x-x_1)\\\\y-3=\frac{0-3}{1.5-0} (x-0)\\\\y=-2x+3[/tex]
The equation that matches the graph is y = -2x + 3
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