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3 years ago

Solve this equation for A:A ÷ 2 = 4 A. 2 B. 6 C. 8 D. 4

Mathematics

2 answers:

KATRIN_1 [288]3 years ago

7 0

Answer is c:8 A=8 so 8 divided by 2 =4

algol133 years ago

6 0

Answer:

C) 8

Step-by-step explanation:

A ÷ 2 = 4

Get the 2 and 4 on the same side of the equal sign

A = 2 * 4

Multiply

A = 8

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You want a savings account to grow to $5000 in 10 years. If interest is 3.5% compounded continuously, how much should you invest

vazorg [7]

Answer:

$3523.44

Step-by-step explanation:

5000 = X × e^(3.5/100)(10)

X = 5000 ÷ e^0.35

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6 0

3 years ago

HELP ME PLEASE True or false: z=−5 is a solution to the inequality −2|z−3|<−20.

Dovator [93]

your question: 

True or false: z=−5 is a solution to the inequality −2|z−3|<−20.

answer: 

-2|z-3|<-20

-------. -----

-2 -2

|z-3|<10

equation 1: equation 2:

z-3<10. z-3>-10

z<13 z>-13

So false, z=-5 is not a solution to the inequality.

hope this helps, have a great day! :)

7 0

3 years ago

Simplify each of the following: 2 1. (3+4i ) + ( 19 - 5i)

ira [324]

I hope this helps you

(3+19)+(4i-5i)

22-i

6 0

3 years ago

A teacher was interested in knowing the amount of physical activity that his students were engaged in daily. He randomly sampled

klasskru [66]

Answer:

The standard error of the mean is 4.5.

Step-by-step explanation:

As we don't know the standard deviation of the population, we can estimate the standard error of the mean from the standard deviation of the sample as:

$\sigma_{\bar{x}}\approx\frac{s}{\sqrt{n}}$

The sample is [30mins, 40 mins, 60 mins, 80 mins, 20 mins, 85 mins]. The size of the sample is n=6.

The mean of the sample is:

$\bar{x}=\frac{1}n} \sum x_i =\frac{30+40+60+80+20+85}{6}=52.5$

The standard deviation of the sample is calculated as:

$s=\sqrt{\frac{1}{n-1}\sum (x_i-\bar x)^2} \\\\ s=\sqrt{\frac{1}{5}\cdot ((30-52.5)^2+(40-52.5)^2+(60-52.5)^2+(80-52.5)^2+(20-52.5)^2+(85-52.5)^2}\\\\s=\sqrt{\frac{1}{5} *3587.5}=\sqrt{717.5}=26.8$

Then, we can calculate the standard error of the mean as:

$\sigma_{\bar{x}}\approx\frac{s}{\sqrt{n}}=\frac{26.8}{6}= 4.5$

6 0

3 years ago

If a=8, b=6 and c=2 what is the value of: 2ac/b

gayaneshka [121]

We need to substituter the values for the variables. 2(8)(2)/(6), or 32/6, or 5.3333

8 0

3 years ago