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JulsSmile [24]
3 years ago
14

Twelve decreased by two times a number is 8. Find the number.

Mathematics
2 answers:
Law Incorporation [45]3 years ago
7 0

Answer:

x = 2

Step-by-step explanation:

We can make an equation that meets the requirements stated.

Decreased signifies subtraction, so 12 will reduce the value after it. A number can be any letter you'd like, but I'll stick to x. Since 2 is multiplying <em>that</em> number, we can make 2 the coefficient. Finally, set it equal to 8.

12 - 2x = 8 Subtract 12 from both sides of the equation.

-2x = -4 Divide by -2 on both sides of the equation.

x = 2

lora16 [44]3 years ago
4 0

Answer:2

Step-by-step explanation: 12-8=4 4/2=2

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3 years ago
Shang has a coupon for 15% off he decided to buy a shirt for 16.95 the sales tax rate is 6% what is his final cost
kati45 [8]

Answer:

After the coupon and sales tax were applied, he paid $15.27 for the shirt.

Step-by-step explanation:

We are given that a shirt is $16.95. This is reduced by 15% due to the coupon.

100\% - 15\% = 85\%

Therefore, 85% of the shirt price is still active.

\displaystyle \frac{85}{100}=0.85

We can multiply this value by the shirt price to find the current price.

16.95 \times 0.85 = 14.4075 \approx \$14.41

However, the shirt also has a sales tax of 6% applied after the coupon.

\displaystyle \frac{6}{100} = 0.06a

Now, we need to find the total price for the shirt.

\displaystyle 14.41 \times 1.06 = 15.2746 \approx \$15.27

Therefore, he paid $15.27 for the shirt.

3 0
3 years ago
Please help me <br> (both images are together)
Illusion [34]

Answer:

Peter should join <u>Lab thinkers</u> to receive a better deal.

Science buddies costs <u>190$</u> for six months.

Lab thinkers costs <u>170$</u> for six months.

Step-by-step explanation:

The equations are...

Science buddies: 10+30x -> 10+30(6)=190

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Peter saves 20$ if he chooses lab thinkers.

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6 0
2 years ago
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Kelly is reading a 1056-page book. During the past 8 days she has read 384 pages. At this rate, how many more days will it take
Karolina [17]

Answer:

14.75 days

Step-by-step explanation:

number of pages she reads a day :

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708/48= 14.75 days

6 0
2 years ago
3x + 4y = 14 x = 2y - 12 cordanit plane
BabaBlast [244]

Answer:

(- 2, 5 )

Step-by-step explanation:

Given the 2 equations

3x + 4y = 14 → (1)

x = 2y - 12 → (2)

Substitute x = 2y - 12 into (1)

3(2y - 12) + 4y = 14 ← distribute and simplify left side

6y - 36 + 4y = 14

10y - 36 = 14 ( add 36 to both sides )

10y = 50 ( divide both sides by 10 )

y = 5

Substitute y = 5 into (2) for corresponding value of x

x = 2(5) - 12 = 10 - 12 = - 2

Solution is (- 2, 5 )

8 0
3 years ago
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