3 years ago

What does 5/7 × 2/1 equal? (Please leave an explanation, so I can understand!)

Mathematics

1 answer:

White raven [17]3 years ago

7 0

$\bf \cfrac{5}{7}\times \cfrac{2}{1}\implies \cfrac{5\times 2}{7\times 1}\implies \cfrac{10}{7}\implies 1\frac{3}{7}$

You might be interested in

Andy and Sam are saving money to go on their senior trip. The amount of money that Andy will have at the end of each week, w, ca

Zanzabum

I think the answer is (400w)

6 0

3 years ago

Read 2 more answers

A toy company is making a miniature model of a dump truck. The steering wheel on the toy car that is 0.6 cm corresponds to the s

pentagon [3]

I used the 55.2 and the 0.6 to find a ratio of 92:1, so for every cm of toy car steering wheel there are 92 cm of real truck steering wheel. so using this ratio i times the 3.5cm of the toy car windshield by the 92, this gave me the answer of 322cm, which theoretically is the answer of this equation. 322cm.

6 0

3 years ago

In a sample of 42 water specimens taken from a construction site, 26 contained detectable levels of lead. Construct 90% confiden

hram777 [196]

Answer:

(0.4958, 0.7422)

Step-by-step explanation:

Let p be the true proportion of water specimens that contain detectable levels of lead. The point estimate for p is $\hat{p}=26/42=0.6190$ . The estimated standard deviation is given by $\sqrt{\hat{p}(1-\hat{p})/n}=\sqrt{(0.6190)(1-0.6190)/42}=0.0749$ . Because we have a large sample, the 90% confidence interval for p is given by $0.6190\pm z_{0.05}0.0749$ where $z_{0.05}=1.6448$ is the value that satisfies that above this and under the standard normal density there is an area of 0.05. So, the confidence interval is $0.6190\pm (1.6448)(0.0749)$ , i.e., (0.4958, 0.7422).