MATHEMATICS MIDDLE SCHOOL

1. Find the slope and the y-intercept of the equation 4x + 5y = -9.2. Find the slope and the y-intercept of the equation y − 3(x − 1) = 0.

3. If a line with a slope of -2 crosses the y-axis at (0, 3), what is the equation of the line?

Answers

Answer 1
Answer:

Answer:

1. The slope is -4/5 and the y-intercept is (0, -9/5).

2. The slope is 3 and the y-intercept is (0,3).

3. The line is y=-2x+3.

Step-by-step explanation:

To find the slope and y-intercept, convert the equation to y=mx+b where m=slope and b=y-intercept.

1. Convert the equation by rearranging the terms using inverse operations.

4x+5y=-9                             Subtract 4x to both sides.

-4x            -4x

------------------------------------

     5y= -9 -4x                       Divide both sides by 5.

       y= -9/5 - 4/5x

This is now in y=mx+b and m=-4/5 and b=-9/5.


2. Convert the equation by rearranging the terms using inverse operations.

y - 3(x-1)=0                             Add 3(x-1) to both sides.

   +3(x-1)      +3(x-1)

------------------------------------

            y = 3(x+1)                  Multiply 3 into the parenthesis.

            y = 3x+3

This is now in y=mx+b and m=3 and b=3.


3. Write the equation of a line using point slope form

y-y_1=m(x-x_1).

This becomes y-3=-2(x-0)\ny-3 = -2 (x)\ny-3 = -2x\ny= -2x+3

Here m =-2 and b=3.

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Answers

idk I think it is 53.33


It is 144. 
6 x 8 = 48 (two identical triangles)
4 x 8 = 32
6 x 4 = 24
10 x 4 = 40
if you add them all up you get 144.

Can i please get some help i will give all my points

Answers

division by zero is not allowed in math because a that fraction is -5 parts out of 0  total parts


if you tried to divide by zero and tried to check by multiplying it out so for example
5/10=2
5=10 times 1/2

5/0=0
5=0 times (it is imposible because anything times 0 is 0)
so the answer is C

Answer:

divide by zero is not allowed in math because that fraction is -5 parts out of 0  total parts.

if you tried to divide by zero and tried to check by multiplying it out, for example

5/10=2

5=10 times 1/2

5/0=0

5=0 times (it is impossible because anything times 0 is 0)

so the answer is C

Step-by-step explanation:

i hope this helps.

For each handmade greeting card jacqui sells,she makes a profit of $0.35. In one week,she made a profit of $42. She sell the cards for $0.75 each. A. About how many greeting cards did jacqui sell that week ?

B.about how much did she earn before paying expenses ?

Answers

The correct answers are:


A) 120 cards; and

B) $90.


Explanation:


Let x be the number of greeting cards sold that week. She earns $0.35 per card and earned $42; this gives us the equation

0.35x = 42


Divide both sides by 0.35:

0.35x/0.35 = 42/0.35

x = 120


She sold 120 cards.


She sells each card for $0.75. This means she earned

0.75(120) = $90.
To work out the number of cards sold, divide the total profit made for the week by the profit made on each card. 42/0.35 = 120. Jacqui sold 120 cards. Then to work out how much she earned before expenses (t), add her profit to the price of each card x how many cards were sold. T = 42 + (120 x 0.75). T = 42 + 09. T = 132. She earned $132 before expenses.

Enrique lives with his grandmother in an apartment building for senior citizens. He earns extra money by running errands for some of his grandmother's neighbors. Enrique charges $2 for every 1
7
hour he spends working. He spent
5
7
hour going to the deli for Mr. McGuire, 1
1
7
hours delivering papers for the apartment manager, and
6
7
hour picking up Mrs. Shultz's groceries.

Did Enrique earn enough money to buy a $34 DVD?

Answers

yes enrique does he will have some left over

Find the whole.
25% of what number is 65?

Answers

Answer:

260

Step-by-step explanation:

65 times four is the answer

Answer:

the answer is 260

Step-by-step explanation:

y x 25%=65

What does it mean for an equation to express y in terms of x?

Answers

it really doesnt matter it just represents a particular equation either ways fine
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