All categories

3 years ago

Janet can shovel snow from her driveway in 65 minutes. Jim can do the same job

Mathematics

1 answer:

Kay [80]3 years ago

4 0

Answer:

about 23 minutes

Step-by-step explanation:

(65x35)/(65+35)= 2,275/100= 22.75 minutes (or 23 if rounded)

You might be interested in

0.67, 43.8, and 1.0073 in expanded

vladimir2022 [97]

That is expanded if im not mistaken LEL

6 0

3 years ago

Write the decimal as a percent 0.09

hjlf

I think it's 90% sorry if I'm wrong

7 0

3 years ago

Ravi bought 50kg rice at the rate it tk40 per kg and sold it at the rate of tk44 per kg. What is the amount of profit or loss?

ololo11 [35]

Here is your Answer

Step-by-step explanation:

Ravi bought rice = 50kg

Rate it =40kg

Sold it at the rate = = 44kg

<h3>Answer: -34</h3><h2 /><h2 /><h2>Mark me as brainlist and give me 20 thx pls</h2>

6 0

2 years ago

choose all of the terms that describe the set of lines. transversal parallel lines perpendicular lines intersecting lines

Greeley [361]

Answer:

C. Perpendicular Lines

D. Intersecting Lines

Step-by-step explanation:

Intersecting lines are a pair of lines, line segments or rays are intersecting if they have a common point.

Perpendicular lines are a point where two city roads intersect.

Hope this helps. I am sorry if you get it wrong.

3 0

3 years ago

The scores for a certain test of intelligence are normally distributed with mean 85 and standard deviation 11. Find the 90th per

jonny [76]

Answer:

99.1 is the 90th percentile of these scores.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 85

Standard Deviation, σ = 11

We are given that the distribution of score is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

We have to find the value of x such that the probability is 0.90

$P( X < x) = P( z < \displaystyle\frac{x - 85}{11})=0.90$

Calculation the value from standard normal z table, we have,

$P(z \leq 1.282) = 0.90$

Putting values, we get,

$\displaystyle\frac{x - 85}{11} = 1.282\\\\x = 99.1$

Thus, 99.1 is the 90th percentile of these scores.

5 0

3 years ago