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3 years ago

Whats the answer easy 20 points

Mathematics

2 answers:

3241004551 [841]3 years ago

8 0

Step-by-step explanation:

Option C is the correct one.

I hope it is helpful.Give brainliest answer if u satisfied with my answer.

ozzi3 years ago

8 0

It is C
step by step explanation

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Benin is sawing boards to make a deck. What is the area of the deck, shown

sergejj [24]

Answer:

C. 108.5 square feet

Step-by-step explanation:

Area of the deck

Area (left triangle) + Area (rectangle) + Area (right triangle)
1/2 x 6 x 7 + 10 x 7 + 1/2 x 7 x 5
21 + 70 + 17.5
91 + 17.5
108.5 square feet

3 0

3 years ago

Write an expression that shows how you can multiply 9 x 475 using expanded form and distributed property

Leviafan [203]

475 = 400 + 70 + 5

therefore

9 × 475 = 9 × (400 +70 + 5) = 9 × 400 + 9 × 70 + 9 × 5
=3600 + 630 + 45 = 4275

I think... It's better to use Distributive Property:
(a - b) × c = a × c - b × c

9 = 10 - 1

therefore:
(10 - 1) ×475 = 10 × 475 - 1 × 475 = 4750 - 475 = 4275

6 0

4 years ago

Read 2 more answers

Find the unit rate 322 miles on 14 gallons of gas

emmasim [6.3K]

322miles=14g
To find the unit rate, divide
322/14=23
The unit rate is 23miles per gallon

5 0

4 years ago

Identify the extraneous and explain why it is extraneous

alisha [4.7K]

Answer: In mathematics, an extraneous solution (or spurious solution) is a solution, such as that to an equation, that emerges from the process of solving the problem but is not a valid solution to the problem.

Step-by-step explanation:

8 0

3 years ago

Victoria is interested in opening her own candy store. She has researched and found that of the 14 stores she investigated, the

Anna71 [15]

Answer:

99% confidence interval for the average start up cost is [76.575 , 123.425].

Step-by-step explanation:

We are given that of the 14 stores Victoria investigated, the average start up cost is 100 thousand dollars with a standard deviation of 29.1 thousand dollars.

So, the pivotal quantity for 99% confidence interval for the population average start up cost is given by;

P.Q. = $\frac{\bar X - \mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\bar X$ = sample average start up cost = 100 thousand dollars

$\sigma$ = sample standard deviation = 29.1 thousand dollars

n = sample of stores = 14

$\mu$ = population average start up cost

So, 99% confidence interval for the average start up cost, $\mu$ is ;

P(-3.012 < $t_1_3$ < 3.012) = 0.99

P(-3.012 < $\frac{\bar X - \mu}{\frac{s}{\sqrt{n} } }$ < 3.012) = 0.99

P( $-3.012 \times {\frac{s}{\sqrt{n} }$ < ${\bar X - \mu}$ < $3.012 \times {\frac{s}{\sqrt{n} }$ ) = 0.99

P( $\bar X-3.012 \times {\frac{s}{\sqrt{n} }$ < $\mu$ < $\bar X +3.012 \times {\frac{s}{\sqrt{n} }$ ) = 0.99

99% confidence interval for $\mu$ = [ $\bar X-3.012 \times {\frac{s}{\sqrt{n} }$ , $\bar X +3.012 \times {\frac{s}{\sqrt{n} }$ ]

= [ $100-3.012 \times {\frac{29.1}{\sqrt{14} }$ , $100+3.012 \times {\frac{29.1}{\sqrt{14} }$ ]

= [76.575 , 123.425]

Therefore, 99% confidence interval for the population average start up cost for a candy store is [76.575 , 123.425].

8 0

3 years ago