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Verizon [17]
3 years ago
12

If x = 4y + 21y and y = 14 + 5, what is 3x × 7? No need to show your work.

Mathematics
2 answers:
podryga [215]3 years ago
7 0

y = 19

x = 4(19) + 21(19) = 76 + 399 = 475

3(475) × 7

1425 × 7

9975 <--- answer.

Hope this helped!

Nate

Brut [27]3 years ago
3 0

Answer:

the answer is 39

Step-by-step explanation:

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Step-by-step explanation:

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6 0
3 years ago
A car can go from 0 m/s to 27 m/s in 4.5 seconds. If a net force of 6600 N acted on
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8 0
3 years ago
If 3(x-3)=24, then x=?
Alexeev081 [22]

Answer: x=11

Step-by-step explanation:

First distribute 3 to both x and -3.

3x-9=24

Then add 9 to both sides to leave the x on its own.

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4 0
3 years ago
Read 2 more answers
Help help help timed exam please
LUCKY_DIMON [66]

Answer:

The correct option is the second option;

a. Division property of equality

b. Symmetric property of congruency

c. Multiplication property of equality

Step-by-step explanation:

a. For the equation in part a., we have;

6·a = 30

Therefore;

6·a/6 = 30/6

a = 5

Which is of the form, if a = b then a ÷ c = b ÷ c, which is the division property of equality

b. For the relationship in part b., we have;

∠ABC ≅ ∠LMN

∠LMN ≅ ∠ABC

The above relationship is of the form, if a ≅ b then b ≅ a, which is the symmetric property of congruency

c. For the equation in part c., we have;

\dfrac{2}{3} \cdot \left (x - 6\right ) = 8

Multiply both sides by 3, to get;

3 \times \dfrac{2}{3} \cdot \left (x - 6\right ) = 3 \times 8 = 24

Cancel like terms on the left hand side of the equation, to get;

2·(x - 6) = 24

Which is of the form, if a = c, then a × c = b × c which is the multiplication property of equality

5 0
2 years ago
A mother is 30 years older than her son. Fifteen years ago the son was 1/3 of
nalin [4]

Let s be the son's age 15 yeasr ago and m the mother's age that year.

s = \dfrac{m}{3}

We also know that:

m = s+30

Plotting vallues:

s = \dfrac{m}{3}\\\\\\3s = s+30\\\\2s = 30\\\\s = 15\\\\m = 45

Remember that they were that age 15 years ago.

So their actual age is 30 and 60.

8 0
3 years ago
Read 2 more answers
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