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3 years ago

PLZZZZZZZZZZZZZZ help

Mathematics

2 answers:

vovangra [49]3 years ago

8 0

Answer:

Step-by-step explanation:

2(-3)^2 + (5)(-3)

you can put this in a calculator to check it; hope this helped! :]

amm18123 years ago

3 0

Answer:

Step-by-step explanation:

18 -15 = 3

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Sprinter #1 is running at a speed of 96 inches/second. Sprinter #2 is running at a speed of 475

ladessa [460]

Answer:

Sprinter #1

Step-by-step explanation:

Sprinter #1 is running at 96/12 feet per second: 8 feet per second

Sprinter #2 is running at 475/60 feet per second: approximately 7.9 feet per second

Sprinter #1 covers more distance per second.

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2 years ago

Can someone help me pleaseeee !!

Arturiano [62]

Answer:

5g/cm³

Step-by-step explanation:

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3 years ago

In a pen of goats and chickens there are 25 heads and 90 feet. How many goats and chickens are in the pen.

Anna [14]

Answer:

5 chickens, 20 goats

Step-by-step explanation:

We can set up two equations and use substitution

There are 25 total goats and chickens, so

$G + C = 25$

Goats have 4 feet and chickens have two, so

$4G + 2C = 90\\$

By solving for G in the first equation,

$G = 25 - C\\$

We can now use substitution,

$G = 25 - C\\4G + 2C = 90\\4(25 - C) + 2C = 90\\100 - 4C + 2C = 90\\-2C = -10\\C = 5\\$

We have 5 chickens, so we have 20 goats.

Let's double check:

$5(2) + 20(4) = 90\\10 + 80 = 90\\90 = 90\\$

It checks out!

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4 years ago

When I was 6 my sister was half my age<br><br> Now I'm 70 how old is my sister?

mrs_skeptik [129]

She would be 67...always going to be 3 years younger

6 0

4 years ago

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Practice test

mariarad [96]

Answer:

it's a rectangle so the area is 6×8=48

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3 years ago

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