All categories

3 years ago

Pls help me I really need help on this

Mathematics

1 answer:

Svetlanka [38]3 years ago

7 0

Answer:

Step-by-step explanation:

i just took the test

You might be interested in

Which lines are parallel if ∠6 ≅ ∠4? Justify your answer.

bekas [8.4K]

<6 = <7 vertical angles

<1 = <4 vertical angles

if <6 = <4

then y is parallel to z because <1 = <7 alternate interior angles are equal

4 0

3 years ago

JoAnn works in a publicity office at the state university. She is paid $13.00 an hour for the first 35 hours she works each week

SVETLANKA909090 [29]

JoAnn would have worked 45 hours. You start by multiplying 13 and 35 and subtract that from 650 to get 195. from there you d8ivide 195 by 19.50 to get 10. Lastly, you add 35 and 10 to get a total of 45 hours

6 0

3 years ago

An automobile manufacturer claims that its car has a 28.0 miles/gallon (MPG) rating. An independent testing firm has been contra

d1i1m1o1n [39]

Answer:

The calculated value z = 1.3145 < 2.326 at 0.02 level of significance

The null hypothesis is accepted

Hence An automobile manufacturer claims that its car has a 28.0 miles/gallon (MPG) rating.

Step-by-step explanation:

Step(i):-

An automobile manufacturer claims that its car has a 28.0 miles/gallon (MPG) rating.

The mean of the Population 'μ' = 28.0miles/gallon

Given data after testing 270 cars, they found a mean MPG of 27.8. Assume the variance is known to be 6.25.

The sample size 'n' = 270

Mean of the sample 'x⁻' = 27.8

Given Population variance 'σ² = 6.25

The standard deviation of Population 'σ' = √6.25 = 2.5

Step(ii):-

Null hypothesis :H₀: 'μ' = 28.

Alternative hypothesis :H₁: 'μ' ≠28.

The test statistic

$Z = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } }$

$Z = \frac{27.8-28 }{\frac{2.5}{\sqrt{270} } } = \frac{-0.2}{0.15214}$

Z = -1.3145

|Z| = |-1.3145|= 1.3145

Step(iii):-

The tabulated value of z-score at 0.02 level of significance = 2.326

The calculated value z = 1.3145 < 2.326 at a t 0.02 level of significance

The null hypothesis is accepted

Hence An automobile manufacturer claims that its car has a 28.0 miles/gallon (MPG) rating.

8 0

3 years ago

| 2) through: (-5, -4), perp. to y = -x + 2

schepotkina [342]

Answer:

$y=x+1$

Step-by-step explanation:

Your generic line will be $y= mx+q$ , so you'll need two condition.

Since it has to be perpendicular to $y=(-1)x+2$ , the product of the slopes needs to be -1, or $m(-1)=-1$ , hence your "generic" becomes $y=x+q$ . Since it has to pass through [/tex](-5;-4), let's put the coordinates in there: $(-4)=1(-5)+qq-5=-4q=1$

your line becomes $y=x+1$

8 0

3 years ago

allsm [11]

Answer:

8+4d=28

4d=28-8

4d=20

d=5

4 0

3 years ago