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kogti [31]
3 years ago
10

Use double number lines to find the missing number. Write a percent proportion and solve each problem.

Mathematics
1 answer:
GaryK [48]3 years ago
6 0
Your answer is: 63 is 90% of 70.

The work (if needed) is shown above :)

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2X+2Y=48<br> 3X+Y=40 <br><br> What is X and Y
marshall27 [118]

Answer:

x=8

y=16

Step-by-step explanation:

2x+2y=48

3x+y=40

Ther is many ways to solve this, one of them is clearance:

WE CLEAR AN UNLOCKED (X) AND REPLACE IT IN THE OTHER

x= (40-y)/3

2[(40-y)/3] +2y=48

(80-2y)/3 +2y=48

(80-2y+6y)/3=48

80+4y=48(3)

4y=144

y= 144/4

y=16

x=(40-y)/3

x=(40-16)/3

x=24/3

x=8

4 0
3 years ago
mandy's square quilt measures 99 inches on each edge. how many yards of trim does she need to buy to go around the entire quilt?
stira [4]

There are 36 in in a yard

36 in ------> 1 yd


99 in ------> x

x = (99)(1)/36
x = 2.75
 99 inches equals 2.75 yards and that is the amount of trim that Mandy needs to go around the entire quilt
5 0
3 years ago
Read 2 more answers
Find a ⋅ b.<br><br> a = &lt;5, 2&gt;, b = &lt;4, 5&gt;
mariarad [96]

Answer:

The answer is 30  

Step-by-step explanation:

To get a.b  

For a = <wa, za> and b = <wb, zb>, the dot product represents multiplication sign.

We say,  

 a•b = (wa)(wb) + (za)(zb)

The next step is to substitute the given information into the above equation we generated.

Then we say,  

 a•b = 5•4 + 2•5

 a.b = 20 + 10

 a•b = 30

The answer is 30  

7 0
4 years ago
1. Choose the correct simplification of the expression −5x2(4x − 6x2 − 3).
nlexa [21]
1) <span>30x4 − 20x3 + 15x2

This is the answer to 1. Don't forget to rearrange the terms in ascending order. That can trip people up. 

2) </span><span>x3 + 8x2 + 13

Don't forget to check the terms sign. The subtraction symbol switches them all. </span>
6 0
4 years ago
(Answer Quickly!!!)<br> Name the property shown<br> (9 + 4) + 7 = 9 + (4 +7)
marysya [2.9K]
Distributive Property?
6 0
4 years ago
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