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3 years ago

11. Describe and correct the error in evaluating the expression. -2(-7)= -14

Mathematics

1 answer:

Ulleksa [173]3 years ago

7 0

Answer:

Step-by-step explanation:

The left side

does not equal to the right side

−

, which means that the given statement is false.

False

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Diane is a software saleswoman. Let y represent her total pay (in dollars). Let x represent the number of copies of English is F

scZoUnD [109]

There is an error in the equation provided. Looking at other similar question such as this, I think the equation related to x and y should be 90x + 1600 = y

Answer:

a) 90

b) 1600

Step-by-step explanation:

The equation 90x + 1600 = y is an equation of a straight line in the form y = mc + c

Adjusting the equation to the general form we get

y = 90x + 1600

m = 90

c = 1600

a) the change in Mary's total pay for each copy she sells in this case is referring to the change of y to the change of x.

In other word, it is the slope of the function.

m = 90

b) if Mary didn't sell any copies, the value of x will be 0.

In graph of a straight line, the value when x= 0 is at the value of y-intercept,

c = 1600

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3 years ago

Look at this graph:

amm1812

For the given graph , slope of the line is equal to ( 1 / 2 ).

As given in the question,

Form the given graph,

Scale is given by,

On x-axis each unit of the graph represent 1 unit.

On y- axis each unit of the graph represent 1 unit.

Consider two coordinates from the line of the graph,

( x₁ , y₁ ) = ( 1, 2 )

( x₂ , y₂ ) = ( 3, 3 )

Slope of the line = ( y₂ - y₁ ) / ( x₂ - x₁ )

Substitute the value in the formula of the slope we get,

Slope of the line = ( 3 - 2 ) / ( 3 - 1 )

⇒ Slope of the line = 1 / 2

Therefore, for the given graph , slope of the line is equal to ( 1 / 2 ).

Learn more about slope here

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1 year ago

At Ron’s Roller Rink, the number of customers has been decreasing at a steady rate of 5% per year. If there were 900 skaters per

lubasha [3.4K]

Based on this information... there should be about 630 skaters in 2006. I hope this helps.

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3 years ago

Read 2 more answers

A savings account earns 4.62% annual interest, compounded continuously. After approximately how many years will a principal of $

ch4aika [34]

Step-by-step explanation:

are you having problems with something if so message this guy

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3 years ago

Labor economists have extensively researched the determinants of earnings. Invest-ment in human capital, measured in years of ed

never [62]

Answer:

Kindly check explanation for other solutions

Years, Inning and saves are statistically significant ; ERA is not.

Step-by-step explanation:

Earning for staying one additional year :

Multiply slope value of years * 1 = 0.052 * 1 * 100 % = 5.2% (earning increases by 5.2%)

Relives with 10 more saves :

10 * 0.0032 * 100% = 3.2% (earning increases by 3.2%)

Having 100 more innings :

100 * 0.00089 * 100% = 8.9%

If ERA is reduced by 1.5 ; earning will increase by (0.0085*100)% * 1.5 = 1.275%

B.) At 5% level of confidence :

α = 1.64

Years = 0.052/0.026=2

Inning = 0.00089/0.00020 = 4.45

Saves = 0.0032/0.0018 = 1.78

ERA = 0.0085/0.0168 = 0.51

Years, Inning and saves are statistically significant as they are greater than α ; As for ERA, it is not statistically significant (0.51 < 1.64)

8 0

3 years ago