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Julli [10]
2 years ago
6

7 (n+4) = 21 Please help me solve this

Mathematics
2 answers:
RoseWind [281]2 years ago
7 0
Answer is n= -1 Explanation first thing you need to do is to divide the 7 and 21 to get n+4=3. After that move the constant 4 and switch it with 3. N+3=4. Then calculate n+3=4 to get n= -1
deff fn [24]2 years ago
5 0

Answer:  n = -1

Step-by-step explanation: distribute 7 to n +4 to get 7n +28 = 21

subtract 28 on both sides, to get 7n= -7 divide by positive 7, and get n=-1

plug it in to check 7(-1+4)=21

-1+4= 3

7(3)= 21

it checks out ^_^

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8 0
3 years ago
I NEED HELP PLEASE :( I DONT UNDERSTAND! LINKS WILL BE REPORTED
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6 0
2 years ago
Read 2 more answers
Find the length of side xz give your answers to 3 significant figures
aleksandrvk [35]

Answer:

XZ ≈ 14.4 cm

Step-by-step explanation:

Using the cosine ratio in the right triangle

cos29° = \frac{adjacent}{hypotenuse} = \frac{ZY}{XZ} = \frac{12.6}{XZ}

Multiply both sides by XZ

XZ × cos29° = 12.6 ( divide both sides by cos29° )

XZ = \frac{12.6}{cos29} ≈ 14. 4 ( to 3 sig. figs )

3 0
3 years ago
Can anyone plz solve this ?? -7 (1+3x) =4+5x
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Step-by-step explanation:

-7(1+3x) = 4 + 5x

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(divide both sides by the coefficient [26])

26x/26= -11/26

x = -11/26

3 0
2 years ago
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