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3 years ago

Find the missing factor. 5y^2+4y-1=(5y-1)()

Mathematics

2 answers:

irina1246 [14]3 years ago

6 0

Answer:

(y + 1 )

Step-by-step explanation:

Given

5y² + 4y - 1

Consider the factors of the product of the y² term and the y- term which sum to give the coefficient of the y- term

product = 5 × - 1 = - 5 and sum = + 4

The factors are + 5 and - 1

Use these factors to split the y- term

5y² + 5y - y - 1 ( factor the first/second and third/fourth terms )

= 5y(y + 1) - 1(y + 1) ← factor out (y + 1) from each term

= (y + 1)(5y - 1)

The missing factor is (y + 1)

sergeinik [125]3 years ago

3 0

Answer:

(5y−1)(y+1)

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

part A

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part B

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4 years ago

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Elis [28]

Option C:

The scale factor of the larger prism to the smaller prism is $\frac{21}{19}$ .

Solution:

Two rectangular prisms are similar.

Surface area of the smaller prism = 361 cm²

Surface area of the larger prism = 441 cm²

Scale factor of larger prism to smaller prism

$$=\frac{\sqrt \text{{Surface area of larger prism}} }{\sqrt\text{{Surface area of smaller prism} }}$

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$$=\frac{\sqrt {21^2} }{\sqrt{19^2}}$

Both square and square roots are cancelled, we get

$$=\frac{21}{19}$

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