2 years ago

HELP PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ

Mathematics

1 answer:

dangina [55]2 years ago

7 0

I’m pretty sure the answer is either D or E but I’m not positive !

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I could REALLY use some help on this.

pickupchik [31]

Picture of work attached.

5 0

2 years ago

A number, n, is multiplied by - 5/8. The products is - 0.40 What is the value of n? It would also help if you would explain how

Kay [80]

I'm not sure if those numbers are negatives or thats just a hyphen but:

N(-5/8)=-0.40

Division is always the opposite of multiplication

-0.40/(-5/8)=0.64

N=0.64

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2 years ago

Casey's grandmother sent her an $85 gift card for her birthday last year. This year, she sent her a $125 gift card. Which propor

EleoNora [17]

The answer is 0.68 or 68%

4 0

3 years ago

Read 2 more answers

A large city newspaper periodically reports the mean cost of dinner for two people at restaurants in the city. The newspaper sta

inysia [295]

Answer: C) 133

Step-by-step explanation:

The formula to find the sample size is given by :-

$n=(\dfrac{z^*\cdot\sigma}{E})^2$

, where z* = Critical z-value

$\sigma$ = Population standard deviation for prior study.

E= Margin of error.

As per given , we have

$\sigma=$35$

E= 5

The critical z-value for 90% confidence level is 1.645.

Substitute al;l the value sin the above formula , we get

$n=(\dfrac{1.645\times 35}{5})^2$

$n=(\dfrac{57.575}{5})^2$

$n=(11.515)^2$

$n=132.595225\approx133$

Hence, the minimum sample size needed is 133.

Thus , the correct answer is : C) 133

6 0

3 years ago

Find the distance between these points: (-3, 8) and (-5,1)

irina1246 [14]

Answer:

7.28011

Step-by-step explanation:

X1 =-3

X2 =-5

Y1 =8

Y2 =1

Distance Formula = √(X2-X1)²+ (Y2-y1)²

Step 1. calculate (X2-X1)²

(-5 - -3)2 = 4

Step 2. calculate (Y2-Y1)²

(1 - 8)2 = 49

Step 3. calculate √4 + 49

= 7.28011

5 0

2 years ago