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Varvara68 [4.7K]
2 years ago
12

Can somebody solve this question?

Mathematics
1 answer:
lawyer [7]2 years ago
8 0

Answer:

3 is the answer because it's value only add by the 3

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Solve using Elimination<br><br> 3x+y=-9<br> y=5x+7
valentinak56 [21]

Answer

x=-2 and y=-3

Step-by-step explanation:

Step: Solvey=5x+7for y:

Step: Substitute5x+7 for y in 3x+y=−9:

3x+y=−9

3x+5x+7=−9

8x+7=−9(Simplify both sides of the equation)

8x+7+−7=−9+−7(Add -7 to both sides)

8x=−16

8x/8=−16/8

(Divide both sides by 8)

x=−2

Step: Substitute−2 for x in y=5x+7:

y=5x+7

y=(5)(−2)+7

y=−3(Simplify both sides of the equation)

7 0
2 years ago
Factorise 15x + 35y - 40 z
Amanda [17]
<span>15x + 35y - 40 z = 5 (3x + 7y -8z)

hope that helps
............................</span>
5 0
3 years ago
Read 2 more answers
Using appropriate properties , find 7/5 × 5/12 − 3/12 × 7/5 − 1/15
Mazyrski [523]

Answer:

\frac{1}{6}

Step-by-step explanation:

\frac{7}{5}  \times  \frac{5}{12}  -  \frac{3}{12}  \times  \frac{7}{5}  -  \frac{1}{15}  =  \frac{7}{5} ( \frac{5}{12}   -  \frac{3}{12} ) -  \frac{1}{15}  =  \frac{7}{5}  \times  \frac{1}{6}  -  \frac{1}{15}  =  \frac{7}{30}  -  \frac{2}{30}  =  \frac{5}{30}  =  \frac{1}{6}

8 0
2 years ago
Help me figure this out please it’s due today i will name you brainliest!
kompoz [17]

Answer:

i know 4 is 1 i think

Step-by-step explanation:

7 0
3 years ago
A piece of wood is divided into two pieces in the ratio of 2:5. One piece is 10 cm long so how long is the other piece?
klio [65]

Answer:

The length of the pother piece of the wood is 25 cm.

Step-by-step explanation:

Let the length of a piece of wood is x such that the ratio of two pieces is 2:5. Two pieces are 2x and 5 x

Length of the first piece is 10 cm. It means, 2x = 10 i.e. x = 5

We have considered that the length of other piece is 5x. It means 5×5 = 25 cm.

Hence, the length of the pother piece of the wood is 25 cm

8 0
3 years ago
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