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Mnenie [13.5K]
3 years ago
10

Please help me with an addition formula problem!

Mathematics
1 answer:
andrew-mc [135]3 years ago
6 0
2a + 3b = 6
5a + 2b = 4

We multiply the first equation by 5 and the second by 2 and and subtract the second from the first:

10a + 15b = 30
-10a -4b = -8

11b = 22
b = 2

2a + 3(2) = 6
2a = 0
a = 0

Checking,
5(0) + 2(2) = 4
4 = 4, true
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A. Corresponding parts of congruent triangles are congruent.
4 0
3 years ago
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7)
Nana76 [90]

Answer:

The answer is c.) 5(2)+2(6-3)

Step-by-step explanation:

This is an addition problem, because you are solving for the multiplied numbers added together.

5(2)+ 2(6-3)

10+(12-6)

10+6

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4 0
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What is this equation 17+ -8+ -8 equals
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Answer:-1

Step-by-step explanation:

Cuz I know

3 0
3 years ago
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<img src="https://tex.z-dn.net/?f=10xy-4x%2B25y-10" id="TexFormula1" title="10xy-4x+25y-10" alt="10xy-4x+25y-10" align="absmiddl
r-ruslan [8.4K]
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(5y-2)x(2x+5)

Step by step explanation:

10xy-4x+25y-10

Factor out 2x from the expression

2x*(5y-2)+25y-10

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2x*(5y-2)+5(5y-2)

Factor out 5y-2 from the expression

(5y-2)x(2x+5)
5 0
2 years ago
You have one type of candy that sells for $1.70/lb and another type of candy that sells for $3.40/lb. You would like to have 8.5
Andrew [12]

Answer: You will need 3.5lbs of the cheaper candy

and 5 lbs of the expensive candy.

Step-by-step explanation:

Let x represent the number of pounds of the cheaper candy that you would need.

Let y represent the number of pounds of the expensive candy that you would need.

You would like to have 8.5 lbs of a candy mixture. It means that

x + y = 8.5

You have one type of candy that sells for $1.70/lb and another type of candy that sells for $3.40/lb. The candy mixture would sell for $2.70/lb. It means that the total cost of the mixture would be 8.5 × 2.7 = $22.95. The expression would be

1.7x + 3.4y = 22.95- - - - - - - - - - - 1

Substituting x = 8.5 - y into equation 1, it becomes

1.7(8.5 - y) + 3.4y = 22.95

14.45 - 1.7y + 3.4y = 22.95

- 1.7y + 3.4y = 22.95 - 14.45

1.7y = 8.5

y = 8.5/1.7

y = 5

x = 8.5 - y = 8.5 - 5

x = 3.5

5 0
3 years ago
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