2 years ago

Simplify the expression (2y+1)-4y^2+2

Mathematics

2 answers:

Grace [21]2 years ago

8 0

Answer:

(2 + 1 ) − 4 2 + 2

Step-by-step explanation:

1. Eliminate redundant parentheses

( 2 + 1 ) − 4 2 + 2 2 + 1 − 4 2 + 2

2 . Add the numbers

2 + 1 − 4 2 + 2 2 + 3 − 4 2

3. Rearrange terms

2 y +3 − 4 2 − 4 2 + 2 + 3

Katena32 [7]2 years ago

5 0

Answer:

-4y^2+2y+3

Step-by-step explanation:

(2y+1)-4y^2+2

2y+1-4y^2+2

-4y^2+2y+1+2

-4y^2+2y+3

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yaroslaw [1]

Answer:97 rods

Step-by-step explanation:

The number of steel rods for 95% confidence level

$n=\left ( \frac{Z_\frac{\alpha }{2}\times \hat{\sigma }}{E} \right )^2$

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Substituting values

$n=\left ( \frac{1.96\times 15}{3}\right )^2$

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Thus 97 rods is tested

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3 years ago

Solve for x. <br><br> 3(x + 5) - 2(x + 2) = 20

IRINA_888 [86]

[tex] 3(x + 5) - 2(x + 2) = 20 \\
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5x + 11 = 20\\
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3 years ago

Read 2 more answers

I NEED HELP ASAP

Allushta [10]

Euler's formula is given by:
C + V = A + 2
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C: number of faces
V: number of vertices
A: number of edges.
Clearing A we have:
A = C + V-2
Substituting values:
A = 21 + 14-2
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Answer:
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C.33

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3 years ago

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2 years ago

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Vlad [161]

Answer:

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Step-by-step explanation:

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3 years ago