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DaniilM [7]
3 years ago
6

It took Mrs. Johnson 1/2 an hour to walk 2 1/2 miles. What is her speed in miles per hour?​

Mathematics
1 answer:
Arisa [49]3 years ago
3 0

Answer:

I think its 5 mph

Step-by-step explanation:

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What is the value of y?<br> 54"<br> A. 126°<br> B. 730<br> C. 63°<br> D. 540
Studentka2010 [4]

Answer: 63 degrees.

Step-by-step explanation:

Angles in a triangle add up to 180 degrees.

Therefore: 54 + y + y = 180

So 54 + 2y = 180

So 2y = 126

Therefore y = 63 degrees.

3 0
3 years ago
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Angles X and Y are complementary. The measure of Angle Y is 55.5 degrees. What is the measure of Angle X?
mina [271]
Two angles are called complementary when their measures add to 90 degrees
8 0
3 years ago
A recent poll of 700 people who work indoors found that 278 smoke. if the researchers want to be 98% confident of their results
Mice21 [21]

Answer:

We are given:

\hat{p}=\frac{278}{700}=0.397

z_{\frac{0.02}{2}}=2.33 is the critical value at 0.02 significance level

E=0.035 is the margin of error

Therefore, the required sample size is:

n=\hat{p}(1-\hat{p}) \left(\frac{z_{\frac{0.02}{2}} }{E} \right )^{2}

      =0.397(1-0.397) \left( \frac{2.33}{0.035} \right)^2

      =0.239391 \times 4431.755102

      =1060.922286 \approx 1061

Therefore, the required sample size n = 1061


5 0
3 years ago
Lisa can shovel snow from her driveway in 65 minutes. tom can do the same job in 55 minutes. how long would it take lisa and tom
Paraphin [41]
65+55=120
120÷2=60
So, it take them 60mins if they worked together.
5 0
3 years ago
Find the area of the shape shown below.
Reil [10]

Answer:

44.5

Step-by-step explanation:

(1 x 12) + (5 x 13)/2 = 44.5

6 0
3 years ago
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