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2 years ago

Both questions I need help on! Thank you.

Mathematics

2 answers:

svetoff [14.1K]2 years ago

6 0

Please help us!!we really need gwlp

zlopas [31]2 years ago

3 0

You need to measure the height of your desk. or just use 2 feet. 2×450 is 900 feet. and so on

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What is -12(5x+2x) Distributed

Mashcka [7]

Answer:

Step-by-step explanation:

=-84x

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Mark me as brainiest

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3 years ago

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Find the solution set.

kow [346]

Answer: 5, -5

Step-by-step explanation:

There are only 2 square roots of 25: plus and minus 5.

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3 years ago

What point he plot to show how far he runs in 8 minutes and 12 minutes?

Dmitriy789 [7]

Answer:

Step-by-step explanation:

because you subtract it.

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3 years ago

Can someone tell me if I'm right or give me the answer? plzzz. I'm giving 100 points so... just answer quick. 0_0

BabaBlast [244]

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2 years ago

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Find the quadratic function that fits the following data. which one function fits.

Oksana_A [137]

Answer:

Step-by-step explanation:

The general rule for the quadratic function is

$y=ax^2+bx+c$

Use the data from the table:

$y(50)=130\Rightarrow 130=a\cdot 50^2+b\cdot 50+c\\ \\y(70)=130\Rightarrow 130=a\cdot 70^2+b\cdot 70+c\\ \\y(90)=200\Rightarrow 200=a\cdot 90^2+b\cdot 90+c$

We get the system of three equations:

$\left\{\begin{array}{l}2500a+50b+c=130\\ \\4900a+70b+c=130\\ \\8100a+90b+c=200\end{array}\right.$

Subtract these equations:

$\left\{\begin{array}{l}4900a+70b+c-2500a-50b-c=130-130\\ \\8100a+90b+c-2500a-50b-c=200-130\end{array}\right.\Rightarrow \left\{\begin{array}{l}2400a+20b=0\\ \\5600a+40b=70\end{array}\right.$