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Tomtit [17]
3 years ago
14

Prove algebraically that each expression has the same value by evaluating each expression for y=5:

Mathematics
1 answer:
Illusion [34]3 years ago
7 0

Answer:

See explanation

Step-by-step explanation:

Given two expressions

7(3y-5)-2(10+4y)

and

13y-55

Substitute y = 5 into each expression:

1.

7(3y-5)-2(10+4y)\\ \\=7(3\cdot 5-5)-2(10+4\cdot 5)\\ \\=7\cdot (15-5)-2\cdot (10+20)\\ \\=7\cdot 10-2\cdot 30\\ \\=70-60\\ \\=10

2.

13y-55\\ \\=13\cdot 5-55\\ \\=65-55\\ \\=10

As you can see the results are the same.

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Answer: ez

Step-by-step explanation:

its b

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2 years ago
Which of the following must be true?
meriva

Answer:

BC < ED ⇒ answer A

Step-by-step explanation:

* Lets revise some facts in the triangle

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- If one angle in a triangle is larger than another angle in a triangle,

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* Lets solve the problem

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∵ CD = 8 and BE = 8

∴ CD = BE

∵ Side BD is a common side in the two triangles

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∵ BC is the opposite side to the angle of measure 24°

∵ ED is the opposite side to the angle of measure 30°

∵ The measure 24° < the measure 30°

∴ The side opposite to the angle of measure 24° < the side opposite

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7 0
3 years ago
Anyone who the answer to this ?
abruzzese [7]
A. Is the answer first choice
5 0
3 years ago
How do i simplify -3x-15?
galina1969 [7]

Answer:

45

Step-by-step explanation:

-3 \times -15

Cancel the negative signs on both sides.

3 \times 15

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8 0
3 years ago
Read 2 more answers
If the interest paid was $1428 on a principal of $5100 and an interest rate of 4%, how many years was the loan for?
Vaselesa [24]

Answer:

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Use the formula I=Prt

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1428  = 5100(.04)t

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3 0
2 years ago
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