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3 years ago

Which of the following represents the sum of the series below? 4+7+10+13+16+19+22+25+28+31+34+37++40

Mathematics

2 answers:

Margarita [4]3 years ago

8 0

Answer: The answer on edge is B.

13 * (4+40)/2

Step-by-step explanation:

Mazyrski [523]3 years ago

6 0

286 is the sum of the series below. You can plug this in or use long addition.
Either that or you make an average and that's your answer.

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Which triangles are similiar to ABC

AlladinOne [14]

If I did everything correctly, It should be DEF.
Hope you get an A :d

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3 years ago

Read 2 more answers

Al lives 30 mi. from Ann. At the same time, they start biking toward each other on the same road. Al’s constant rate is 12 mph.

dolphi86 [110]

C. 1.5 hours. divide 12 by 8, and you get 1.5.

4 0

3 years ago

Which of this fraction are greater then1/2 but less then 3/4 .7/8 .2/5 .1/3 .5/8 .3/6

avanturin [10]

Answer: 7/8

Step-by-step explanation:

think of each faction as a pie or pizza.

each one will have the number of slices as the bottom number of the fraction.

now shade in the top numbers and see if it more than your 1/2

you will see 7/8 is the answer since it will be one piece left from being complete or "gone"

hope this helped angel!!

4 0

3 years ago

supervisor records the repair cost for 25 randomly selected dryers. A sample mean of $93.36 and standard deviation of $19.95 are

Simora [160]

<h2><u>Answer with explanation:</u></h2>

The confidence interval for population mean (when population standard deviation is unknown) is given by :-

$\overline{x}-t^*\dfrac{s}{\sqrt{n}}< \mu$

, where n= sample size

$\overline{x}$ = Sample mean

s= sample size

t* = Critical value.

Given : n= 25

Degree of freedom : $df=n-1=24$

$\overline{x}= \$93.36$

$s=\ $19.95$

Significance level for 98% confidence interval : $\alpha=1-0.98=0.02$

Using t-distribution table ,

Two-tailed critical value for 98% confidence interval :

$t^*=t_{\alpha/2,\ df}=t_{0.01,\ 24}=2.4922$

⇒ The critical value that should be used in constructing the confidence interval = 2.4922

Then, the 95% confidence interval would be :-

$93.36-(2.4922)\dfrac{19.95}{\sqrt{25}}< \mu$

$=93.36-9.943878< \mu$

$=83.416122< \mu$

Hence, the 98% confidence interval for the mean repair cost for the dryers. = $83.4161$

4 0

3 years ago

For what value of x is AABC - ADEF?<br> HELP PLEASE!!

NeX [460]

Answer:

A) x = 12

Step-by-step explanation:

4x-6 = 42

4 = 48

x = 12

7x+10 = 94

7x = 82

x = 12

7 0

3 years ago