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Anarel [89]
3 years ago
11

Four times the sum of 8 and some number is 4. What is the number?

Mathematics
2 answers:
Virty [35]3 years ago
4 0

Answer:

<h2>-7</h2>

Step-by-step explanation:

Let the unknown number be x

4(8+x)=4

Expand

4(8+x )\\4\times 8 = 32\\4 \tiimes x = 4x\\\\= 32+4x

32+4x =4

Collect like terms and simplify

4x =4-32\\4x = -28

Divide both sides of the equation by 4

\frac{4x}{4} = \frac{-28}{4}

Simplify

x =-7

Lunna [17]3 years ago
3 0

Answer:

\Huge \boxed{\mathrm{-7}}

\rule[225]{225}{2}

Step-by-step explanation:

Let the number be x.

4(x+8)=4

Dividing both sides by 4,

x+8=1

Subtracting 8 from both sides,

x=-7

The number is -7.

\rule[225]{225}{2}

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I need help with this one too
natali 33 [55]

Hey there! :)

Answer:

y = 11.

Step-by-step explanation:

Set both of the equations equal:

5x - 9 = x² - 3x + 7

Rearrange the equation:

0 = x² - 3x - 5x  + 9  + 7

Combine like terms:

0 = x² - 8x + 16

Factor:

0 = (x -4)²

Solve for x:

0 = x - 4

x = 4.

Plug this into an equation to solve for 'y':

y = 5(4) - 9

y = 20 - 9

y = 11.

3 0
3 years ago
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bearhunter [10]

Answer:

5/8 ÷ 4 = 5/32

Step-by-step explanation:

4 0
2 years ago
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Sonny Siebert earned $485,000 a year as a rookie pitcher for the Cleveland Indians. Assuming a tax rate of 6.2% for Social Secur
Norma-Jean [14]

Answer:

14379.50

Step-by-step explanation:

If I remember correctly, the Medicare tax is taken on Gross Income. The question has already limited the base amount for Social Security.

<em><u>Social Security:</u></em> 118,500 * 6.2/100 =   7347

Medicare Tax:    485,000*1.45/100 =  <u>7032.50</u>    Add

Add                                                       14379.50

Sonny paid 14370 in taxes for these 2 items.

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A cube with side lengths of 2 feet has a volume of 8 cubic feet.
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3 years ago
If the area rectangle below us 39 square feet find the x value
Leya [2.2K]

Answer:

x=5 and x=-11

Step-by-step explanation:

(x-2)(x+8)=39

x^2+6x-16=39

Subtract 39 from both sides

x^2+6x-55=0

Factor:

(x-5)(x+11)=0

Set factors to 0.

x-5 =0

x+11 =0

x=5, x=-11

7 0
3 years ago
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