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3 years ago

Factor 20x2 + 50x + 20.

1 answer:

5 0

$20x^2 + 50x + 20$

$GCF=10
$

$10(\dfrac{20x^2}{10} + \dfrac{50x}{10} + \dfrac{20}{10}$

$10(2x^2+5x+2)$

$10(2x^2+4x+x+2)$

$10(2x(x+2)+(x+2))$

$10(x+2)(2x+1)$

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liubo4ka [24]

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3 years ago

Substitute 9 into each equation to determine if 9 is the solution. Drag each equation into the correct column.

IRISSAK [1]

Answer:

m times 3 = 27

b plus 4 = 13

p minus 5 = 4

Those can all be solved with 9

the other can not

Step-by-step explanation:

i hope this helped

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3 years ago

A 32 year old mother realized that her age is twice the sum of her two children ages. Her son Jose is two years older than her d

jenyasd209 [6]

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3 0

3 years ago

Read 2 more answers

A sound wave travels through iron at a rate of 5120\,\dfrac{\text{m}}{\text{s}}5120 s m 5120, start fraction, start text, m, e

klio [65]

Answer:

18432 km/h

Step-by-step explanation:

It is given that a sound wave travels through iron at a rate of 5120 m/s.

We know that

1 km = 1000 m

1 hour = 60 minutes

1 minutes = 60 second

Using these conversions we get

1 m = 0.001 km

1 hour = 3600 second

$5120\text{ m/s }=5120\times 0.001\times 3600\text{ km/h}$

$5120\text{ m/s }=18432\text{ km/h}$

Therefore, the sound wave travels through iron at a rate of 18432 km/h.

6 0

3 years ago

0.8y+0.25= -0.4 Solve for y

disa [49]

Answer:

y = -13/16

Step-by-step explanation:

Given:

0.8y+0.25= -0.4

To Find:

Solve for y

Solution:

Multiply both sides by 100

$0.8y\cdot \:100+0.25\cdot \:100=-0.4\cdot \:100$

Simplify

$80y+25=-40$

Subtract 25 from both sides

$80y+25-25=-40-25$

Simplify

$80y=-65$

Divide both sides by 80

$\frac{80y}{80}=\frac{-65}{80}$

Simplify

$y=-\frac{13}{16}$

Thus, y = -13/16

or in decimal form it equal y = -0.8125

~Lenvy~

7 0

2 years ago

Read 2 more answers