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anyanavicka [17]
3 years ago
6

Which statement correctly explains how Andre could find the solution to the following system of linear equations using eliminati

on?
8s - 9t = 15
7s - 2t = 12

Multiply the first equation by –7 and the second equation by 8, and then subtract.
Multiply the first equation by -7 and the second equation by 8, and then add.
Multiply the first equation by 2 and the second equation by 9, and then add.
Multiply the first equation by –2 and the second equation by 9, and then subtract.
Mathematics
2 answers:
anzhelika [568]3 years ago
8 0

Answer:

it's B

Multiply the first equation by -7 and the second equation by 8, and then add.

trust me

Deffense [45]3 years ago
6 0

Answer: choice; b) Multiply the first equation by -7 and the second equation by 8, and then add.

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Answer:

D,4 times as large as the expressian

Step-by-step explanation:

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rjkz [21]

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A. True

B. False

Step-by-step explanation:

B is false because rational numbers have either repeating decimals or numbers that come to an end.

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3 years ago
“The amount y (in cups) of flour is proportional to the number x of eggs in a recipe. the recipe calls for every two eggs. inter
masha68 [24]

Answer:

A. y=3/2x

B. y=3/2x

C. 18

 

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Please help on these two​
jeyben [28]

Answer:

For your first problem you want to see what all the sides would equal

You would have to combine them all into one big equation

5x-7+3x+1+4x=30 (now you want to combine like terms)

12x-7+1=30 (combined the x's together)

12x-6=30 (added -7 and 1)

12x=36 (added 6 to each side)

x=3 (divided 12 to each side)

Now you wanna plug 4 in for x for each side to find out the largest to smallest

AB=5(3)-7= 8

BC=3(3)+1= 10

AC=4(3)= 12

So in order from smallest to largest would be angle C, B, A because

Angle C is the smallest angle because the sides AC and BC are the longest so they form the smallest angle

Then it would be angle A being the largest because the smallest sides in length AB and BC make up the biggest angle

The next problem would be that in order for it to have to be a triangle the two smallest sides needs to add up higher than the third side so

11, 11, 24, 11+11=22, which is less than 24 so not this one

18,12,9, 9+12=21 which is greater that 18 so this one would be a triangle

9,10,19, 9+10=19 which 19 isn't greater than 19 so this one is not a triangle

4,7,23, 4+7=11 which is less than 23, so this one is also not a triangle

So your answer would be 18cm,12cm,9cm

8 0
3 years ago
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