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Leto [7]
3 years ago
6

What is the value of x when x + 7 = 21? A) -28 B) -14 C) 3 D) 14

Mathematics
2 answers:
koban [17]3 years ago
7 0
The answer would be D.)

Because
X+7=21
X=21-7
X=14
DerKrebs [107]3 years ago
4 0
The answer would be D
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What is the solution of the system? Use substitution.
trasher [3.6K]

Hi

4x-y=5

3x-7=2

We need to solve 3x-7=2 for x

Let's start by adding 7 to both sides

3x-7+7=2+7

3x=9

Now just divide both sides by 3 so we can find the value for x

3x/3=9/3

x=3

Now substitute 3 for x in 4x-y=5

4x-y=5

(4)(3)-y=5

-y+12=5

Now add -12

-y=12-12=5-12

-y=-7

Divide both sides by -1 so we can eliminate the negative sign

-y/-1=-7/-1

y=3

The answer is A

(3,7)

I hope that's help:0

6 0
3 years ago
Which of the following is a correct interpretation of the expression -4 - (-7)−4−(−7)minus, 4, minus, left parenthesis, minus, 7
romanna [79]

Answer:

B

Step-by-step explanation:

you  take away the 7 and it then b

6 0
3 years ago
Tanya’s swim club increased their $29 membership fee by $6 a year. What is the approximate percent increase in the membership fe
Sunny_sXe [5.5K]
Hello! The answer is definitely not C or D, because that's way too i God an increase for this type of setting. It increased by around 20%, because when 35 and 29 are divided and you multiply the decimal by 100, when you ignore the "1" at the front, it shows an approximate 20% increase. The answer is A.
7 0
3 years ago
Read 2 more answers
I think it’s b but I’m not sure but can somebody help me
aev [14]

Answer:

B

Step-by-step explanation:

The small triangle is half the size of the entire triangle. 27/2 = 13.5

4 0
3 years ago
HELP I NEED HELP ASAP
Tpy6a [65]

Answer:

I think it's -14

Step-by-step explanation:

x = 0 so the x won't be included but

-2 • x = -2x

-12 • x = -12x

-2x + (-)12x = -14

hope this helps :)

7 0
3 years ago
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