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Gelneren [198K]
2 years ago
8

#14 Please answer the question

Mathematics
1 answer:
Ivenika [448]2 years ago
8 0

Answer:

D is the right answer

Step-by-step explanation:

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Which value must be added to the expression x2 – 3x to make it a perfect-square trinomial?
Vitek1552 [10]

Answer:

\frac{9}{4}

Step-by-step explanation:

Given

x² - 3x

To make the expression a perfect square

add ( half the coefficient of the x- term )²

x² + 2( - \frac{3}{2} )x + \frac{9}{4}, thus

x² - 3x + \frac{9}{4}

= (x - \frac{3}{2})² ← a perfect square

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3 years ago
Question 1 of 10
Greeley [361]

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B

Step-by-step explanation:

Pardons for Confederate leaders

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The Pythagorean Theorem what is this????????
raketka [301]
I’m also struggling with that but it’s the perimeter of a right triangle
3 0
3 years ago
How do you solve this using substitution <br> -8x-y=-30<br> Y=12x-50
never [62]

Step-by-step explanation:

substitude the y value into y in the first equation

-8-(12x-50)=30

-8-12x+50=30

you see it?

then solve

-8+50-30=12x

you got the value = 12x

then you divide with 12

finally you get x

7 0
3 years ago
The Middle Grades Math Club needs to raise money for its spring trip to Washington, D.C., and for its Valentine’s Day dance. The
Elena L [17]

A.

Cars            Amount

0 cars          $-117.50

1 car             $-113.50

2 cars          $-109.50

3 cars           $-106.50

4 cars           $-102.50

10 cars          $-77.50

50 cars         $82.50

100 cars        $282.50

I do not know what graph you have but, you can see how much money you will make because it will form a straight line on the graph. As long as you continue the line, you will be able to see how many cars you have to clean to make a certain amount of money. Same is for the table.

B.

The change in the amount of money earned with each car is $4.00

The change on the graph is shown by the increasing slope.

C.

The number of cars that need to be washed can be seen by using the formula y=4x-117.5

The information from part a and b is used to show that there is a constant change (slope) and that more money is made by washing more cars.

3. The members need to wash 30 cars (rounded up from 29.375) to break even.

4.  The members would have to wash 249 cars (rounded from 248.125) to fund their Washington trip.

The members would have to wash 117 cars (116.875) to fund their Valentine's Day Dance.

5. They would have to wash 366 cars.

Realistic

This can be realistic if there are a lot of members in the Math Club and if they set up in a good location. It will be successful.

Not Realistic

This is not realistic because there are many other factors that need to be taken into consideration. There might not be enough cars or people that are willing to get their car cleaned by these students. There are other supplies that they might need to buy and more.

4 0
3 years ago
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