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2 years ago

The sum of two numbers is -149. One number is 5 less than the other. Find the numbers

2 answers:

8 0

DEFINE VARIABLES:
x- first number
y- second number

FORM THE TWO EQUATIONS:
x + y = -149
x = y-5

PLUG IN FIRST VALUE TO FIND SECOND (order you plug in doesn’t matter):
(y-5) + y = -149

SIMPLIFY:
(y-5) + y = -149
2y -5 = -149
2y = -144
y = -72

PLUG IN SECOND VALUE TO FIND FIRST:
x + y = -149 —> y = -x-149

x = (-x-149) -5
x = -x -154
2x = -154
x= -77

WRITE FINAL SOLUTION:
(x,y)
(-77, -72)

PSYCHO15rus [73]2 years ago

6 0

Answer:

-72 and -77

Step-by-step explanation:

-149 divided by 2 is 74.5 and sense we want a 5 difference we divide 5 by 2 to get 2.5 the we take 74.5 and add 2.5 to get - 72 and take 74.5 and subtract 2.5 to get -77.

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−9x (5x+4 ) +10 (x+3) can someone please solve his for me thank u step by step please i really need to find out how to do it

Ivahew [28]

Answer:

-45 $x^{2}$ -26x+30

Step-by-step explanation:

So first you let's divide this equation into three parts.

Part one -9x(5x+4)

Step one: you have to distribute the -9x to the numbers in the parentheses. That would leave us with a -9x*5x = -45 $x^{2}$ and -9x*4 = -36x
Step two: Put the answers together. That would leave us with -45 $x^{2}$ -36x.

Part two 10(x+3)

Step one: you have to distribute the 10 to the numbers in the parentheses. That would leave us with a 10*x = 10x and 10*3 = 30
Step two: Put the answers together. That would leave us with 10x+30

Part three solve

Step one: combine and put together what you have solved for. That would leave us with a -45 $x^{2}$ -36x+ 10x+30
Step two: combine like terms. The like terms here are -36x and 10x. When you combine them you would get -26x.
Step three: Write the equation in standard form. Therefore the answer is -45 $x^{2}$ -26x+30.

Let me know if anything is confusing!

5 0

1 year ago

What is the square root of 10,000plus the square root 450 and is it more of less than the square root of 50,000

andre [41]

2120 and its more than

3 0

2 years ago

Read 2 more answers

Mentally solve 18 × 25

koban [17]

Answer:

450

Step-by-step explanation:

Step 1:

18 × 25 = 450

Answer:

450

Hope This Helps :)

3 0

3 years ago

Read 2 more answers

Will u help me?

sergey [27]

Answer:

Charles practiced for the relay race for D. 9 hours last week.

Step-by-step explanation:

First, I would find the ratios the ratios for converting hurdle to javelin and javelin to relay.

Hurdle : Javelin ; 5 : 1.5

Javelin : Relay ; 2.5 : 5 or 1 : 2

Next, find the factors compared to the original numbers for hurdle to javelin.

15 / 5 = 3

To find the amount of javelin time they did, multiply 1.5 by the factor we got, 3.

1.5 * 3 = 4.5

Finally, double 4.5, since Charles does twice as much relay than he does javelin.

4.5 * 2 = 9 hours

3 0

2 years ago

Identify the perimeter of a rectangle in which h = 8 ft and a = 144x ft^2. please help asap

Blababa [14]

Here, Given

h= 8ft

a=144 * ft^2

then,

A=L*H

144=L*8 or 144/8 =L

L=18

now, P=2(L+H)

P=2(18+8)

P=52m

Perimeter and area are two important and basic mathematical subjects. They help quantify the physical space and also provide a more advanced foundation of mathematics in algebra, trigonometry, and calculus. Perimeter is a measure of the distance around a shape, and area indicates how much area the shape covers.

The perimeter of a 2D shape is the distance around the shape. You can imagine wrapping a string around a triangle. The length of this cord is around the triangle. Or, if you're traveling outside the park, take a route that goes around the edge of the park.

Learn more about Perimeter & Area here: brainly.com/question/24571594

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7 0

1 year ago