Help help help help help

Blake and Ned work for home remodeling business they are putting the final touches on a home they renovated. working alone Blake

stiks02 [169]

Answer:

3.6 hours

Step-by-step explanation:

Blake can do work in hours = 9

Blake can do a part of work in 1 hour = $\frac{1}{9}$

Ned can paint the same room in six hours.

Ned can do a part of work in 1 hour = $\frac{1}{6}$

They can do a part of work together in 1 hour = $\frac{1}{9}+\frac{1}{6}$

= $\frac{5}{18}$

Now they can do $\frac{5}{18}$ part of work in hour = 1

So, they can do whole work in hours = $\frac{1}{\frac{5}{18}}$

= $3.6$

Hence it will take 3.6 hours to paint the room if they work together.

6 0

2 years ago

The proportion of left handed people in the population is about 0.10. Suppose a random sample of 300 people is observed. (a) Wha

pantera1 [17]

Answer: $(\hat{p})\sim N(0.10,\ 0.017)$

Step-by-step explanation:

Sampling distribution of the sample proportion $(\hat{p})$ :

$(\hat{p})\sim N(p,\ \sqrt{\dfrac{p(1-p)}{n}})$

The sampling distribution of the sample proportion $(\hat{p})$ has mean = $\mu_{\hat{p}}=p$ and standard deviation = $\sigma_{\hat{p}}=\sqrt{\dfrac{p(1-p)}{n}}$ .

Given : The proportion of left handed people in the population is about 0.10.

i.e. p=0.10

sample size : n= 300

Then , the sampling distribution of the sample proportion $(\hat{p})$ will be :-

$(\hat{p})\sim N(0.10,\ \sqrt{\dfrac{0.10(1-0.10)}{300}})$

$(\hat{p})\sim N(0.10,\ \sqrt{0.0003})$

$(\hat{p})\sim N(0.10,\ 0.017)$ (approx)

Hence, the sampling distribution of the sample proportion $(\hat{p})$ is $(\hat{p})\sim N(0.10,\ 0.017)$

8 0

3 years ago

In the diagram below <br> Please help I’ll give brainliest

Luda [366]

Answer:

m<GFA = 110

Step-by-step explanation:

1. ABCD - parallelogram Definition of a parallelogram

(AB ll CD) (AD ll BC)

2. m<B + m<C = 180 Consectuive angles in a

110 + m<C = 180 parallelogram are supplementary

m<C = 70

3. m<GCB = 1/2 m<C Definition of angles bisector

m<GCB = 70

4. m<B = m<D = 110 Opposite angles in a

parrallelogram are congruent

5. m<CDG = 1/2 m<D Defintion of an angle bisector

m<CDG = 55

6. m<GCB+m<CDG+m<CGD=180 Sum of anlges in a triangle (ΔCDG)

70 + 55 + m<CGD = 180

125 + m<CGD = 180

m<CGD = 55

7. m<CGD + m<DGF = 180 Linear pair, supplmentary angles

55 + m<DGF = 180

m<DGF = 125

8. m<C = m<A = 70 Opposite angles in a paralellogram

are congruent

9. m<ADG = 1/2m<D Definiton of an angle bisector

m<ADG = 55

10.m<ADG+m<DFG+m<GFA+m<A=360 Sum of angles in quadrilateral

55 + 125 + m<GFA + 70 = 360 DGFA

m<GFA + 250 = 360

m<GFA = 110

4 0

2 years ago

Triangle ABC is translated on the coordinate plane below to create triangle A'B'C'. . . . . If parallelogram EFGH is translated

lina2011 [118]

The ordered pair of point H is (1, -7). The correct answer between all the choices given is the third choice. I am hoping that this answer has satisfied your query about and it will be able to help you, and if you’d like, feel free to ask another question.

8 0

2 years ago

PLEASE HELP! 15 POINTS!

Aleonysh [2.5K]

Step-by-step explanation:

x y

−3 0

−1 −2

2 −5

6 −9 is a nonlinear

because when you plot the points given x=-3 y=0 and x=-1 y=-2 are found in the 3rd quadrant and the rest are found in the 4th quadrant.

which will not make the points linear

Hope this will help

6 0

3 years ago