MATHEMATICS MIDDLE SCHOOL

Explanation Please???

Answers

Answer 1

Answer:

We know that Center 1 collects 715 pints per day and Center 2 collects 1035 pints per day.

They are asking for the estimated combined amount of blood from both centers in 3 days.

Estimate 715 as 700, and 1035 as 1000

This is written as

3(700+1000)= estimated total amount

To evaluate, simplify.

3(1700)= 5100 pints in 3 days from both centers

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Solve the system of equations.
y= 2x
y= x^2 - 15

Answers

Answer:

Since both equations are equal to each other given that they are both equal to y, you can say that . . .

2x = x^2 - 15

x^2 - 2x - 15 = 0

(x-5) (x+3) = 0

Zero Product Property

x = 5 ; x = -3

Solve for y:

y = 2(5) ; y = 2(3)

y = 10 ; y = 6

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PLEASE Answer!!!! What is 14-x=21 what does x equal.

Answers

$14-x=21\ \ \ |subtract\ 14\ from\ both\ sides\n\n-x=7\ \ \ |change\ signs\n\n\boxed{x=-7}$

$check:\n\nL_s=14-(-7)=`14+7=21=R_s$

A person lives 78 years. Does a average person live for at least 1,000,000 minutes

Answers

1,000,000 minutes
Divide that by 60 to get 16666.6, thats it in hours
Divide that by 24 to get 694.4, thats the number of days
Divide that by 365 to get about 1.9. Thats 1,000,000 minutes in years.
So yes, the average person lives for at least 1,000,000 minutes, in fact they live for a lot more than that!

One year = 365 days. If the average person lives 78 years then you would multiply that times 365.

365 times 78 equals 28470

Help me plzzzzzzz ??????

Answers

I think the answer is C
12-5=7
7x-20

it's A because
$5x - 12x = 7x$
and the 20 you leave it in

Jim cash the paycheck and went shopping he spent 3/8 of it on a mower 2/5 of it on at chainsaw and 180 On Tools if he has 270 left how much was his paycheck worth

Answers

Declaration

Let the original amount of the paycheck be x

Equation

Paycheck - cost of mower - cost of chainsaw - 180 = 270

x - [(3/8)x + (2/5)x + 180] = 270

Solve

Change 3/8 and 2/5 to a common denominator and add.

3*5/8*5 + 2*8/5*8 = 15/40 + 16/30 = 31/40

x - [(31/40)x + 180] = 270 Remove the outer brackets

x - (31/40)x - 180 = 270 Evaluate the "x"s

40/40x - 31/40x - 180 = 270

9x/40 - 180 = 270 Add 180 to both sides

9x/40 = 180 + 270

9x/40 = 450 Multiply by 40

9x = 18000 Divide by 9

x = 18000/9

x = 2000

His paycheck was 2000 dollars.

Mrs. Jackson bought 6 ballon of juice for the party. Each gallon has 16 cups. If 3 cups of juice were left over,how many cups did People drink at the party?A. 13 Cups
B. 48 cups
C. 78 cups
D. 93 cups

Answers

answer is D. 93 cups I think

The answer is D 93.....

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