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Annette [7]
3 years ago
8

What is 21x+6 solve for x

Mathematics
1 answer:
mamaluj [8]3 years ago
8 0

Answer:

x =  -  \frac{2}{7}

Step-by-step explanation:

21x + 6 = 0 \\ 21x =  - 6 \\ x =  -  \frac{2}{7}

•you divide both sides by 21 to leave x alone

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PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
slamgirl [31]

x = Alicia's age

Amy is 8 years older than twice her cousin Alicia's age so Amy's age = 2x + 8

Sum of their ages is less than 32

x + 2x + 8 < 32

3x + 8 < 32

3x < 24

x < 8

So Alicia's age is greater than 0 but less than 8 years old

(0 < x < 8)

Answer:

A) 0 < x < 8


4 0
3 years ago
The price of a watch was increased by 20% to £162.<br>What was the price before the increase?​
Bas_tet [7]
The original price is 135
Step-by-step explanation:
Write equation. Let o be original price, r be rate of increase, P be the increased price. o+ro=P
Substitute values. Original price (o) is unknown, so that will stay as it is; we know that the increased price (P) is 162; we know that the rate of increase (r) is 20%, which in decimal form is 0.20 o+0.20o=162
Add like terms. o is the same as 1o. So 1+0.20 is 1.20. 1.20o=162
Isolate the variable (o). To isolate o, you need to divide both sides by 1.20. 1.20 divided by 1.20 is the same as 1. 162 divided by 1.20 is 135. o=135
Check your work. Plug in the values into the equation and check if it is correct: o+ro=P becomes (135)+(.20)(135)=162. That is simplified into 135+27=162, which is further simplified into 162=162
It’s correct, the answer is 135
3 0
3 years ago
Read 2 more answers
Twice the difference of a number and 4 is equal to three times the sum of the number and 10.
aleksandr82 [10.1K]

Answer:

2(x-4)=3(x+10)

Step-by-step explanation:

3 0
2 years ago
A recipe requires 5/6 of a cup of sugar. If Mrs. Marina is going to make one half of the recipe, then how much sugar does she ne
MAVERICK [17]

one half = \dfrac{1}{2}

If Mrs. Marina is going to make one half of the recipe, then she needs

\dfrac{5}{6} :2=\dfrac{5}{6}*\dfrac{1}{2} =\dfrac{5}{12}

Answer: Mrs. Marina needs \dfrac{5}{12} of sugar to make one half of recipe.

5 0
3 years ago
Help cant seem to figure out.
Dafna1 [17]

Answer:

For a cylinder there is 2 kinds of formulas the lateral and the total. the lateral surface area is just the sides the formula for that is 2(pi)radius(height). the formula for the total surface area is 2(pi)radius(height) + 2(pi)radius squared.

5 0
3 years ago
Read 2 more answers
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