4 years ago

Write an equivalent expression for 7a + 21

Mathematics

1 answer:

PSYCHO15rus [73]4 years ago

4 0

7(a+3) this is the answer im pretty sure

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Consider the following set of equations:

alina1380 [7]

B. x+4=3x+6 ..........

3 0

3 years ago

Circle A has a radius of 2.0 cm. Find the radius of circle A dialated by 9.6

tia_tia [17]

2.0² * π = 12.56637...
12.56637... * 9.6 = 120.6371579...
120.6371579.. / π = 38.4
√38.4 = 6.196773354... --> the radius of circle A dialated by 9.6 = 6.2 cm

7 0

3 years ago

B + 4 = 2b - 5 <br> B= ??

Sergio039 [100]

Answer:

B=9

Step-by-step explanation:

b+4=2b-5

b-2b+4=-5

b-2b=-5-4

-b=-5-4

-b=-9

b=9

6 0

3 years ago

Read 2 more answers

The value of which of these expressions is closest to e?

mars1129 [50]

Answer:

Step-by-step explanation:

Given: expressions

To find: the expression whose value is closest to e

Solution:

Value of e is 2.718

$\left ( 1+\frac{1}{19} \right )^{19}=\left ( \frac{20}{19} \right )^{19}=2.65\\\left ( 1+\frac{1}{22} \right )^{22}=\left ( \frac{23}{22} \right )^{22}=2.659\\\left ( 1+\frac{1}{20} \right )^{20}=\left ( \frac{21}{20} \right )^{20}=2.653\\\left ( 1+\frac{1}{21} \right )^{21}=\left ( \frac{22}{21} \right )^{21}=2.656$

Therefore, value 2.659 is closest to the value of e.

So, option B. is correct.

7 0

3 years ago

How do you find the area of a circle with the circumference?

Naya [18.7K]

Circumference = 2*pi*radius

find the radius using this formula.

then use this formula => area of circle = pi*radius*radius

put the value of the radius that you get with the first formula to find the area

hope it helps you

6 0

3 years ago