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3 years ago

PLZ I NEED URGENT HELP

Mathematics

1 answer:

Hunter-Best [27]3 years ago

6 0

Answer:

<em>Project 4 Score ; 41</em>

Step-by-step explanation:

Assuming that Project 4's score is x;

( Project 1 + Project 2 + Project 3 + Project 4 ) / 4 ⇒ take to substituting the value of each Project, provided Project 4's score being x;

45 = 42 + 49 + 48 + x / 4 ⇒ combine like terms,

45 = ( 139 + x ) / 4 ⇒ let 4 be a common denominator among numerator terms,

45 = 139 / 4 + x / 4 ⇒ divide 139 over 4,

45 = 34.75 + x / 4 ⇒ subtract 34.75 from either side,

10.25 = x / 4 ⇒ Multiply either side by 4,

x = 41 = Score of Project 4,

<em>Solution; Project 4 ⇒ 41</em>

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The average cost of a compact car at a certain dealership over the last ten years has ranged from $14,000 to $18,500. Suppose yo

mezya [45]

Answer:

Part (A): The scale of y: 1 interval being equal to 500 units and from 14,000 to 18,500.

Part (B): The good interval to use for the y-axis should be 1 to 10.

Step-by-step explanation:

Consider the provided information.

As we know the X axis represents the independent variable, since years are the independent variable. So, X axis represents the years.

Y axis represents the dependent variable, since average cost is dependent variable. So, Y axis represents the average cost.

Part (A) what is a good scale to use for the y-axis?

It is given that range is from $14,000 to $18,500.

So, 1 interval being equal to 500 units, so that it will suitable for 18,500.

The scale of y should be 14,000 to 18,500 as 14,000 is the starting average cost and 18,500 is the last average cost.

Part (b) what is a good interval to use for the y-axis?

The scale for x should be 1 year. As It should start from 1 to 10.

The good interval to use for the y-axis should be 1 to 10.

The required scale is shown in figure,

8 0

3 years ago

Jack has a rectangular patio with a length that is one foot less than twice its width. His neighbor Ron's patio has the same wid

swat32

Answer:

difference in area = 16 ft²

if you use 8 the difference in length between Jack patio and his neighbor patio will be will be 15 - 13 = 2 ft

if you use 13 the difference i length will be 25 - 18 = 7 ft

Step-by-step explanation:

Jacks rectangular patio

width = a

length = 2a - 1

area = lw

where

l = length

w = width

area = 120 ft²

a(2a - 1)

2a² - a - 120 = 0

(a - 8) (2a + 15)

a = 8 or -15/2

Ron's rectangular patio

width = a

length = a + 5

area = lw

area = 104 ft²

a (a + 5) = 104

a² + 5a -104 = 0

(a + 8) (a - 13)

a = -8 or 13

How many square feet longer is jack patio longer than Ron's patio is the difference in their area. Therefore,

120 - 104 = 16 ft²

The value 8 or 13 can be used for a since the width a have to be the same.

if you use 8 the difference in length between Jack patio and his neighbor patio will be will be 15 - 13 = 2 ft

if you use 13 the difference i length will be 25 - 18 = 7 ft

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2 years ago

If y varies jointly as x and z and y = 4 when x = 2 and z = 3, what is y when x = -6 and z = 2?

sp2606 [1]

Answer:

Step-by-step explanation:

Y = kxz

Putting values of y x and z in the equation

4 = k(2)(3)

4 = k6

2/3 = k

Now finding y when x = - 6 and z = 2

Y = kxz

= 2/3(-6)(2)

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3 0

3 years ago

On discovering that her family had a 70% risk of heart attack, Erin took a treadmill test to check her own potential of having a

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The probability of Erin not having a heart attack according to her family history would be 30%.

The probability of the test predicting correctly is 67%.

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3 years ago

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What goes on the lines I don’t understand the problem

Elis [28]

Answer:

Step-by-step explanation:

a). Let the number of spoons = x

And number of forks = y

Total number of spoons and forks bought by Perry = 10

x + y = 10 --------(1)

Cost of one spoon = $5

Cost of one fork = $3

Therefore, total cost of x spoons and y forks = $(5x + 3y)

5x + 3y = 42 -------(2)

b). Now we can convert these equations into the slope-intercept form.

x + y = 10 ⇒ y = -x + 10

Table for input output values,

x 2 4 6

y 8 6 4

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3y = -5x + 42

y = $-\frac{5}{3}x+14$

x 0 3 6

y 14 9 4

Point of intersection of these lines will be (6, 4).

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3 years ago