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2 years ago

What was the average rate in miles per hour (problem shown in picture)

Mathematics

1 answer:

Vladimir79 [104]2 years ago

6 0

Answer:

39 miles/1 hr

Step-by-step explanation:

13m=20min

20x3=60min

60min=1hour

13x3=39

39m=1hour

unit rate:

39 miles/ 1 hr

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7/10 / -2/5 wha t answer

Westkost [7]

Answer:

-7/25

Step-by-step explanation:

Could be in fraction:

-7/25

or in decimal expression:

-0.28

8 0

2 years ago

Can someone help me with this geometry question.

Feliz [49]

Because this is 4 sided, it is 360°(in total)

The shape is parallel on 2 sides(shown by the red arrows), so (5x)° = 90°

5x = 90

x = 18°

You can add all the angles together and set it equal to 360°

90° + (5x)° + (5(y+11))° + (4y-10)° = 360°

Since you know 5x is 90°, you can plug it in

90° + 90° + (5(y+11))° + (4y-10)° = 360°

180° + (5(y+11))° + (4y-10)° = 360° Subtract 180° on both sides

(5(y+11))° + (4y-10)° = 180°

5y + 55° + 4y - 10° = 180°

9y + 45° = 180°

9y = 135°

y = 15°

x = 18°, y = 15°

3 0

3 years ago

Two samples are randomly selected from each population. The sample statistics are given below.

STALIN [3.7K]

Answer:

Null hypothesis: $\mu_1 \leq \mu_2$

Alternative hypothesis: $\mu_1 > \mu_2$

The statistic is given by:

$t= \frac{\bar X_1 -\bar X_2}{\sqrt{\frac{s^2_1}{n_1} +\frac{s^2_2}{n_2}}}$

And replacing we got:

$t=\frac{72.86-67.34}{\sqrt{\frac{15.98^2}{150} +\frac{35.67^2}{275}}}=2.194$

And the best option would be:

2.19

Step-by-step explanation:

We have the following info given:

n1 = 150 n2 = 275

$\bar x_1 = 72.86, \bar x_2 = 67.34$

s1 = 15.98 s2 = 35.67

We want to test the following hypothesis:

Null hypothesis: $\mu_1 \leq \mu_2$

Alternative hypothesis: $\mu_1 > \mu_2$

The statistic is given by:

$t= \frac{\bar X_1 -\bar X_2}{\sqrt{\frac{s^2_1}{n_1} +\frac{s^2_2}{n_2}}}$

And replacing we got:

$t=\frac{72.86-67.34}{\sqrt{\frac{15.98^2}{150} +\frac{35.67^2}{275}}}=2.194$

And the best option would be:

2.19

7 0

2 years ago

Express 60 as a percentage of 96

svet-max [94.6K]

Answer is : 60/96 x 100

7 0

2 years ago

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Yes I do have Thanksgiving package but I'm trying to do everything today plz help

valentinak56 [21]

the 4th container will contain 6.35

4 0

3 years ago

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