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beks73 [17]
3 years ago
15

What is the equivalent property of 7(x+3)

Mathematics
1 answer:
Margarita [4]3 years ago
4 0

Answer:

7x+21

Step-by-step explanation:

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Steve can text 20 emojis in 24 seconds.At that rate,how many emojis can he text in 2 minutes and 48 seconds
Lelu [443]

Answer:140

Step-by-step explanation:

24/20=168/N

Cross product

24×n=168×20

24n=3360

n=3360/24

n=140

8 0
3 years ago
The mosquito population is a function of rainfall, and can be approximated by the formula N(x)=−x3+45x2+1000 where x is the numb
KiRa [710]

Answer:

Therefore the population will be maximum when x=30 inches.

Step-by-step explanation:

Given that, the mosquito population is a function of rainfall and can be approximated by the formula

N(x)= -x^3+45x^2+1000

where x is the number of inches of rainfall.

N(x)= -x^3+45x^2+1000

Differentiating with respect to x

N'(x)= -3x^2+90x

Again differentiating with respect to x

N''(x)=-6x+90

Now we set N'(x)=0

-3x^2+90x=0

\Rightarrow -3x(x-30)=0

\Rightarrow x=0,30

N''(0)=-6.0+90=90>0

N''(30)=-6.30+90=-90

Since at x=30, N''(x)<0, So at x=30, N(x) has maximum value.

Therefore the population will be maximum when x=30 inches.

5 0
3 years ago
What is the answer to (5x20)-6
Zina [86]

Answer:

the awnser is 94 because 5×20=100-6=96

3 0
3 years ago
Sole this question ? <br>30÷5+(9×5)-3²=<br>​
yuradex [85]

Answer:

  • 30÷5+(45)-9
  • 6+45-9
  • 42
  • I do exams and quizzes if ur interested
7 0
3 years ago
Read 2 more answers
How does the division rule for exponents help in understanding why anything to the zero power is 1?
Nookie1986 [14]
In the division rule you subtract the exponents<span> when </span>dividing<span> numbers with the same base. </span>One<span> rule for exponents is that exponents add when you have the same base. This works for any number x that you want to plug in except for x = </span>0<span>,because </span>0/0<span> is indeterminate (it is like dividing </span>zero<span> by </span>zero<span>). No matter what number we use when it is raised to the </span>zero power<span> it will always be </span>1.
5 0
3 years ago
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