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Margarita [4]
4 years ago
10

Eight less than four times the number c is twenty. What is the value of c?

Mathematics
2 answers:
olganol [36]4 years ago
6 0

Answer:

c=7

Step-by-step explanation:

The problem says that 8 less than 4 times c is less than twenty, so we can first show 8 less than 20.

4c -( I did this because it said 4 times the number c)

Then, we show 8 less than that.

4c-8

It says it is twenty, and that means it equals twenty.

4c-8=20

Now we solve!

4c-8=20

   +8  +8

*we add 8 to both sides*

4c=28

*we divide both sides by 4 since we want to isolate c*

c=28/4

c=7

I hope this helped!

Anna007 [38]4 years ago
6 0

Answer:

-5

Step-by-step explanation:

because 8 less than 4

= 4 - 8

= -4

and if -4 x c = 20 then...

c= 20÷ - 4

= -5

so c= -5

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Multiply (9x+2y)(9x-2y)
Gala2k [10]

Hi there!

Here are all the steps into multiplying these 2 parentheses :

(9x + 2y) × (9x - 2y)

9x × 9x = <u>81x²</u>

9x × -2y = <u>-18xy</u>

2y × 9x = <u>18xy</u>

2y × -2y = <u>-4y²</u>


81x² - 18xy + 18xy - 4y²


-18xy + 18xy = 0


Your answer is: 81x² - 4y²


There you go! I really hope this helped, if there's anything just let me know! :)

6 0
3 years ago
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Factor the following Polynomial both 13 and 14
Maksim231197 [3]
A•B=C
A•B=-21
Find factors of 21 ( it doesn't matter that it's negative ) that at up to be 4
It's 7and 3
Then put x^2+7x+3x-21 and then factor by grouping
Do the same steps for #2
8 0
3 years ago
Helllp this is easy​
Mazyrski [523]

Answer: 12 feet.

Step-by-step explanation:

Use the Pythagorean theorem to solve:

a^2 + b^2 = c^2\\5^2 + b^2 = 13^2\\25 + b^2 = 169\\b^2 = 144\\b = 12

The third side length is 12.

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4 years ago
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A company pays 12% commission on sales less than $7,000.00. 14% commission on sales
aleksandrvk [35]

Answer:

<em>The total commission is: $840 + $1,120 + $672 = $2,632</em>

Step-by-step explanation:

<u>Multi-Level Commissions</u>

For sales less than $7,000, a company pays a 12% commission.

For sales between $7,000 and $15,000, the company pays 14%.

For sales greater than $15,000, the company pays 15%.

Let's calculate the commission on sales of $19,480.

For the first $7,000, the commission is:

12*7,000/100 = $840

The remaining sales base is now $19,480-$7,000 = $12,480

For the portion of $8,000 between $7,000 and $15,000, the commission is:

14*$8,000/100 = $1,120

The remaining sales base is now $12,480 - $8,000= $4,480

This portion gets the final 15%:

15*$4,480/100 = $672

The total commission is: $840 + $1,120 + $672 = $2,632

4 0
3 years ago
The value of the expression 2(3) +3(2)–3x4–5(2)-5+(7x4) is
Sliva [168]

Answer: the answer is 46

Step-by-step explanation:

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