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3 years ago

Statistical Question

Mathematics

1 answer:

nadezda [96]3 years ago

5 0

Answer:

Step-by-step explanation:

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1. Justin jogs 3 miles every morning. He

hammer [34]

Answer:

Step-by-step explanation:

He jobs 7 miles every morning:

3 miles in the morning, and 4 miles in the evening.

Which equals 7.

8 0

3 years ago

I don't remember how to do this. Please help

Karolina [17]

Ok so let’s say that the first number is is the c axis. and the number is -6 you would play that one negative -6 in the 3rd quadrant

6 0

3 years ago

Read 2 more answers

A company that manufactures and bottles apple juice uses a machine that automatically fills 16–ounce bottles. There is some vari

AlexFokin [52]

Answer: 0.1587

Step-by-step explanation:

Given : The amount dispensed is approximately normally distributed with Mean : $\mu=\ 16$

Standard deviation : $\sigma= 1$

The formula to calculate the z-score :-

$z=\dfrac{x-\mu}{\sigma}$

For x= 17

$z=\dfrac{17-16}{1}=1$

The p-value = $P(17$

$=1-P(z$

The proportion of bottles will have more than 17 ounces = 0.1587

8 0

3 years ago

Two planes simultaneously left the Washington and LA and headed towards each other. The distance between the cities is 2700 mile

katrin2010 [14]

Answer:

Speed of the plane from Washington: $500\ mph$

Speed of the plane from LA: $600\ mph$

Step-by-step explanation:

We need to remember that:

$d=Vt$

Where "d" is distance, "V" is speed and "t" is time.

Let be "w" the speed in mph of the plane from Washington and "l" the speed in mph of the plane from LA.

We know that the distance between the cities is 2700 miles and after they flied for 2 hours, the distance between them was 500 miles. Then we can write the following equation:

$2w + 2l + 500 = 2700$ [Equation 1]

Since the speed of the plan from LA was 100 mph faster, we can write this equation:

$l=w+100$ [Equation 2]

The steps to solve this are:

1. Substitute the Equation 2 into the Equation 1 and solve for "w":

$2w + 2(w+100) + 500 = 2700\\\\4w+200+500=2700\\\\w=\frac{2000}{4}\\\\w=500$

2. Substitute the value of "w" into the Equation 2 in order to find "l":

$l=500+100\\\\l=600$

7 0

4 years ago

Solve the system by substitution.<br> 2.5x-3y=-13<br> 3.25x-y=-14

MrMuchimi

Answer:

x=-4

y=1

Step-by-step explanation:

For the given system of equations,

2.5x-3y=-13.....eqn(1)

3.25x-y=-14.....eqn(2)

We first make y the subject of eqn (2)

This implies that,

y=3.25x+14.....eqn(3)

We substitute eqn (3) into eqn (1)

2.5x-3(3.25x+14)=-13

2.5x-9.75x-42=-13

-42+13=9.75x-2.5x

-29=7.25x

Dividing through by 7.25, we obtain

x=-4

We now put the value of x into eqn (2)

3.25(-4)-y=-14

This implies that,

-13+14=y

y=1

4 0

3 years ago