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xxMikexx [17]
3 years ago
11

What is the difference of the two expressions? ( 3 7 + 9) − ( 2 7 − 3)

Mathematics
1 answer:
ivann1987 [24]3 years ago
8 0

Answer:

22

Step-by-step explanation:

Simplify the expression

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Consider a circle that has a circumference of 28/3.14 centimeters. What is the area of this circle? Answer fast plz also can you
bija089 [108]

Answer:

A=6.33\ cm^2

Step-by-step explanation:

step 1

Find the radius of the circle

we know that

The circumference of a circle is equal to

C=2\pi r

we have

C=\frac{28}{3.14}\ cm

\pi=3.14

substitute the values

\frac{28}{3.14}=2(3.14)r

r=\frac{28}{19.7192}\ cm

r=1.42\ cm

step 2

Find the area of the circle

The area of the circle is equal to

A=\pi r^{2}

substitute the values

A=(3.14)(1.42)^{2}

A=6.33\ cm^2

7 0
3 years ago
I was charged .88 cents in tax whats the sales tax rate
nikdorinn [45]

Answer:

2%

Step-by-step explanation:


3 0
3 years ago
A bacterium cell splits into 2 cells every hour. Write and evaluate an exponential expression to find how many cells there will
timurjin [86]

Answer:

2^x

64 bacterium

10 hours

Step-by-step explanation:

doubles every hour

if x = hours

2^x

2^x --> 2⁶ = 64

2^x = 1024

1024 = 2^10 ---> x=10

7 0
3 years ago
Which is better a polar bear or an LED light bulb. Most deepest answer gets brainiest
Leona [35]

Answer:

polar bear bc who doesnt want a polar bear in theyre room B)

Step-by-step explanation:

polr bears r cool

7 0
2 years ago
Sari sold 300 boxes of greeting cards in November. In december she sold 500. What was the percentage increase in her sales
grigory [225]
There was a 66 \frac{2}{3}% increase from Sari's sales from November to December. 

To find the percentage increase in her sales, we must first find the amount her sales increased. We can do that by subtracting the greeting cards sold in November from the number of greeting cards sold in December. Substituting values and simplifying, we get that she sold 200 more greeting cards in December.

To find what percent increase this is, we must find what percent 200 is of the number of greeting cards sold in November. We can do this by dividing 200 by the number of cards sold in November (300), and then multiplying by 100 (to make it a percent). Doing this, we get \frac{2}{3} * 100 which gives us our answer of 66 \frac{2}{3}%.
3 0
3 years ago
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