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nevsk [136]
3 years ago
12

For each ordered pair , determine wether it is a solution to 3x+7y=17 .

Mathematics
1 answer:
katrin2010 [14]3 years ago
5 0

Answer:

no, no, yes, no

Step-by-step explanation:

3x + 7y = 17

1. 3(5) + 7(3) = 17 ---> 15 + 21 = 17 (false)

2. 3(-8) + 7(-2) = 17 ---> -27 + -14 = 17 (false)

3. 3(-6) + 7(5) = 17 ---> -18 + 35 17 (true)

4. 3(8) + 7(-1) = 17 ---> 18 + -7 = 11 (false)

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ON THE SMARTBOARD, THE
Dafna11 [192]

answer

width = 98 cm

length = 105 cm

set up equations

the perimeter of a rectangle = 2W + 2L

p = 2W + 2L

the perimeter is also 406

406 = 2W + 2L

we know that the length of the rectangle is 7 cm longer than the width so

L = W + 7

substitute equations and solve for width

plug L into p = 2W + 2L to get

406 = 2W + 2(W + 7) distribute the 2 to the terms in the parentheses

406 = 2W + 2W + 14

406 = 4W + 14

392 = 4W

W = 98

substitute equations and solve for length

now that we know the width, we can substitute W in L = W + 7 to find length

L = W + 7

L = 98 + 7

L = 105

final dimensions

width = 98 cm

length = 105 cm

5 0
4 years ago
Pyramid A has a volume of 60 mm cubed and pyramid B has a volume of 937.5 mm cubed. What is the ratio of their heights?
Norma-Jean [14]
We know that
volume pyramid A=[scale factor]³*volume pyramid B
so
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scale factor=∛[60/937.5]----> scale factor=0.4

<span>the ratio of their heights is equal to the scale factor
hA/hB=0.4</span>
3 0
3 years ago
Find the distance between the points (4/4,1/10) and (2/5,7/10)​
snow_tiger [21]

Answer:

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Step-by-step explanation:

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6 0
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Answer:

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Step-by-step explanation:

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8 0
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