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3 years ago

Solve the system of equations. 8x + 5y = 24 y = -4x x = y =

Mathematics

1 answer:

Trava [24]3 years ago

7 0

Answer:

x = -2

y = 8

Step-by-step explanation:

8x + 5y = 24

y = -4x

8x + 5 (-4x) = 24 (Substitute y value)

8x - 20x = 24 (Multiply)

-12x = 24 (Combine like terms and divide)

x = -2

y = -4 (-2) (Substitute x value. Multiply)

y = 8

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ASAP!: can anyone solve three times the difference of Federico age and 4 increased by 7 is greater than 37 what are possible val

Alexandra [31]

Answer:

Federcio's age possible values are those that are greater than 14 i.e 15, 16, 17 and so on

Step-by-step explanation:

Let Federico's age = x

Three times the difference of Federico’s age, and 4 means:

3(x - 4)

Increased by 7:

3(x - 4) + 7

Is greater than 37:

3(x - 4) + 7 > 37

Solving the inequality:

3x - 12 + 7 > 37

3x - 5 > 37

3x > 37 + 5

3x > 42

x >42/3

x > 14

Federcio's age possible values are those that are greater than 14

7 0

3 years ago

9.21 <br><img src="https://tex.z-dn.net/?f=9.21%20%5Cdiv%200.4%20%3D%20" id="TexFormula1" title="9.21 \div 0.4 = " alt="9.21 \di

Whitepunk [10]

Let us do it by converting the 0.4 to a fraction, it has one decimal, so we'll use one zero at the denominator.

and 9.21 to a fraction as well, two decimals, thus two zeros at the denominator then,

$\bf 9.21\div 0.4\\\\
-------------------------------\\\\
0.\underline{4}\implies \cfrac{04}{1\underline{0}}\implies \cfrac{4}{10}\implies \cfrac{2}{5}\qquad \qquad \qquad \qquad 9.\underline{21}\implies \cfrac{921}{1\underline{00}}\\\\
-------------------------------\\\\
9.21\div 0.4\implies \cfrac{921}{100}\div \cfrac{2}{5}\implies \cfrac{921}{100}\cdot \cfrac{5}{2}\implies \cfrac{921}{20}\cdot \cfrac{1}{2}\implies \cfrac{921}{40}
\\\\\\
23\frac{1}{40}\implies 23.025$

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3 years ago

What is 3z + 2 when z = 2?

I am Lyosha [343]

Answer:

b 8

Step-by-step explanation:

just replace the z with a 2 and solve

3(2)+2

4 0

3 years ago

Read 2 more answers

Mr.Richards wants to buy disposable masks for his family. Blue mask cost 1.50 and white mask cost 2.50. He has 45 dollars to spe

Colt1911 [192]

Answer:

he would have to buy the blue masks at 1.50 each

Step-by-step explanation:

you divide

$45 \div 20 = 2.25$

witch equals 2.25 so he can only spend $2.25 per mask so that's how i found out he can only buy the blue masks

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3 years ago

Which number is next in this series? 10, 4, 3, 11, 15…

lora16 [44]

Answer:

The answer would be any number that has 8 letters, the most common one being 14.

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3 years ago