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3 years ago

If (see picture), which statement must be true? PLEASE HELP!!

Mathematics

1 answer:

lisov135 [29]3 years ago

6 0

Answer:

it is c i am pretty sure this is correct

Step-by-step explanation:

ttoook test

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To make each costume, Rachel uses 6 yards of material and 3 yards of trim. Suppose she uses a total of 48 yards of material to m

Brilliant_brown [7]

$48 \div 6 = 8 \\ 8 \times 3 = 24$

7 0

3 years ago

Read 2 more answers

Penny used 2/5lb. Of flour to bake a vanilla cake. She used another 3/4lb. Of flour to bake a chocolate cake a. How much flour d

Finger [1]

Answer:

A. How much flour did she use for both cakes?

1 3/20 lb flour

B. If she started with a 5lb. Bag, How much flour does she have left?

3 17/20 lb

Step-by-step explanation:

Penny used 2/5lb. Of flour to bake a vanilla cake. She used another 3/4lb. Of flour to bake a chocolate cake

A. How much flour did she use for both cakes?

We solve the above question by adding up the pound of flour used for both cakes.

2/5lb Of flour + 3/4lb Of flour

Lowest common denominator = 20

= 8 + 15/20

= 23/20

= 1 3/20 lb flour

B. If she started with a 5lb. Bag, How much flour does she have left?

This is calculated as:

5 lb - 1 3/20 lb

= 3 17/20 lb

8 0

2 years ago

A sample size must be determined for estimating a population mean given that the confidence level is % and the desired margin o

Sauron [17]

Complete Question

The complete question is shown on the first uploaded image

Answer:

$n =290$

$n =129$

The correct option is D

Step-by-step explanation:

From the question we are told that

The margin of error is $E = 0.23$

The largest value is k = 15

The smallest value is u = 7

From the question we are told the confidence level is 95% , hence the level of significance is

$\alpha = (100 - 95 ) \%$

=> $\alpha = 0.05$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 1.96$

Generally population standard deviation estimate is mathematically represented as

$\sigma = \frac{Range }{4}$

Here the Range is mathematically represented as

$Range = k - u$

=> $Range = 15 - 7$

=> $Range = 8$

=> $\sigma = \frac{8 }{4}$

=> $\sigma = 2$

Generally the sample size is mathematically represented as

$n = [\frac{Z_{\frac{\alpha }{2} } * \sigma }{E} ] ^2$

=> $n = [1.96 * 2 }{0.23} ] ^2$

=> $n =290$

Generally to obtain a conservatively small sample size the population standard deviation estimate becomes

=> $\sigma = \frac{Range }{6}$

=> $\sigma = \frac{8 }{6}$

=> $\sigma =1.333$

Generally the conservatively small sample size is mathematically evaluated as

$n = [\frac{Z_{\frac{\alpha }{2} } * \sigma }{E} ] ^2$

=> $n = [1.96 * 1.333 }{0.23} ] ^2$

=> $n =129$

6 0

3 years ago

What is the area of this face?

Paladinen [302]

Answer:

242 ft^2

Step-by-step explanation:

15 x 14 + 4 x 8 = 242 ft^2

(break down the polygon into two rectangles)

6 0

3 years ago

Evaluate each expression <br><br> 1-(-8)

julsineya [31]

1-(-8)
1+8 (add a line change the sign)
=9

4 0

3 years ago