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Valentin [98]
3 years ago
11

21x40=840, so 21x 42 = Use mental math

Mathematics
1 answer:
Bad White [126]3 years ago
8 0

Answer:

882

Step-by-step explanation:

mental math right ;)

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8. The high school graduating class of 2000 was 260 students. Five years later, the graduating class was 320 students. By 2010,
olga nikolaevna [1]

Answer:

the question is confusing but the answer is 2010

Step-by-step explanation:

because in the year 2000 it was

260

then increased by

60

over 5 years making the next class

320

then in 2010 it was

400

and 320 + what is 400?

80

so the answer is:

2010

4 0
3 years ago
Can someone help me with this ONE question? Write an equation.. and solve for X
matrenka [14]

Answer:

Equation: 720=(8x-1)+110+(5x+36)+116+(7x+19)+(6x-2)

x=17

Step-by-step explanation:

A 6 sided polygon is 720° degrees

so

720=(8x-1)+110+(5x+36)+116+(7x+19)+(6x-2)

Simplify

720=(8x+5x+7x+6x)+(−1+110+36+116+19+−2)

Combine like terms:

720=26x+278

flip equation:

26x+278=720

subtract 278 from both sides

26x=442

divide by 26 both sides:

x=17

Hope this helps.

7 0
3 years ago
Earn $134 in 8 hours how much did you earn per hour
Xelga [282]
I believe you would just divide 134 by 8

134/8 = 16.75

That means you would earn $16.75 per hour.
8 0
3 years ago
Read 2 more answers
Add the following fractions and simplify if needed<br> 2/3 + 1/5 =
masha68 [24]

Answer:

13/15

Step-by-step explanation:

2/3 + 1/5

You first,

  1. Find the L. C. M, i hope u know the full name, if u don't, let me know in the comment section.
  2. the L. C. M is 15
  3. therefore it will be 10+3/15
  4. 13/15
5 0
2 years ago
.A bacteria culture grows at a rate of 20%
Zolol [24]

The number of the specimens would be in the culture after 5 minutes will be 7,962.62.

<h3>What is an exponent?</h3>

Consider the function:

y = a (1 + r) ˣ

Where x is the number of times this growth occurs, a = initial amount, and r = fraction by which this growth occurs.

A bacteria culture grows at a rate of 20% per minute.

If the culture initially has 3,200 bacteria specimens.

Then the equation will be

y = 3200 (1 + 0.2) ˣ

y = 3200 (1.20) ˣ

Then the number of the specimens would be in the culture after 5 minutes will be

y = 3200 (1.20)⁵

y = 7962.62

More about the exponent link is given below.

brainly.com/question/5497425

#SPJ1

5 0
2 years ago
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