Mathematics High School

PLZ HELP Word Problems on the system of equations:


The sum of two numbers is twelve and the difference of two numbers is -4. Find these two numbers.



If there are twice the number of nickels”x” then there are quarters”y” and the amount of money is 1.75. Find the number of each coin.

Answers

Answer 1

Answer:

let the two number be x and y then,

x+y=12

x-y=-4

-----------

2x=8

or, x = 4 put the value of x in first equation

4+y= 12

or, y=12-4

or, y= 8 hence the two number is 4 and 8

Related Questions

Find the area of the shape shown below

Answers

Answer:

32 square units

Hope it helps!!!

the answer is 32 units 12+4=16 16*4=64 64/2 is 32 units

Marcelo jogs at a speed of 7 miles per hour when there are no hills. He plans to jog up a mountain road which will cause his speed to decrease by r miles per hour. Which of the following expressions represents the time, t, in hours it will take him to jog 13 miles up the mountain road?
a. t=13/7r
b. t=7+r/13
c.t=13-r/7
d. t=13/7+r

Answers

Answer:

2.3 hours rounded I suppose.

Step-by-step explanation:

You have jogged 5 miles from the park at a rate of r miles per hour. On your way back to the park your average speed increases by 1 mile per hour.

a. Write an expression for the time t (in hours) it takes to jog 5 miles

from the park as a function of your average speed r (in miles per hour) ___________

b. When you run back to the park, your average speed increases by 1 mph.

Write an expression representing your new speed. ___________

c. Write an expression for the time t(in hours) it takes to jog 5 miles

back to the park. ___________

d. Use your answers to parts a and c to write an expression that gives the total jogging time T (in hours) as a function of your average speed r (in miles per hour) when you are jogging away from the park. Write your answer as a single rational expression.

e. Find the total jogging time if you jogged away from the park at an average speed (r) of 4 miles per hour. Round your answer to the nearest tenth.

hours or 135 minutes

2.3 hours rounded I suppose.

I don't know how to do this math problem-
A dare to tell my biggest secret *sob*
I like my best friend 0-0

Answers

Answer:

cool thats nice

Step-by-step explanation:

Which equation represents this statement?

"Five more than twice a number, x
, is equal to one less than three times that same number, x
."

A: 2 x+ 5 = 3 x- 1
B: 5 x= 3 x- 1
C:2 x+ 5 = 3( x- 1)
D: 5 + 2 x= 1 - 3 x

Answers

Answer:

A

Step-by-step explanation:

5 + 2x = 3x - 1

(4,4)(8,5)(-4,2) find slope intercept forum

Answers

Answer:

y =1/4 x + 3 i think

Step-by-step explanation:

A triangle has side lengths of 16 cm and 6 cm. Which could be the value of the third side, 23 cm or 20 cm? The value (select) cm is the value of the third side.

Answers

Answer:

15 cm

Step-by-step explanation:

Find each angle measure

Answers

Step-by-step explanation:

m<AEC= 180-152= 28°

m<CEB= 180-28=152°

m<FEC= 90+28=118°

find m<RQT please help​

Answers

Answer:

Step-by-step explanation:

Before beginning voice lessons, Colin already knew how to sing 2 pieces, and he expects to
learn 2 new pieces during each week of lessons. How many weeks of lessons will Colin need
before he will be able to sing a total of 50 pieces?

Answers

Answer: Answer is 24 though

Answer:

24 weeks of lessons

Step-by-step explanation:

use y = mx + b

y = total pieces Colin can sing = 50

m = pieces learned each week of lessons = 2

x = number of weeks = ?

b = pieces colin knew before lessons = 2

50 = 2x + 2              (subtract 2 from both sides)

48 = 2x                     (divide both sides by 2)

x = 24 weeks

what is 3 divided by c

Answers

Answer:

1.00069229 × 10-8 s / m

Step-by-step explanation:

Answer:

3/c

Step-by-step explanation:

Rewrite the division as a fraction.

~Hoped this helped~

After Robert E.Lee’s surrender in 1865, the Texas government collapsed, and the governor and other state officials fled to Mexico and South America.


Please select the best answer from the choices provided

T
F

Answers

Answer:

True

Step-by-step explanation:

Answer:

The answer is True

Step-by-step explanation:

what is the meaning of pie

Answers

Here's what's important: Pi (π) is the 16th letter of the Greek alphabet, and is used to represent the most widely known mathematical constant. By definition, pi is the ratio of the circumference of a circle to its diameter. In other words, pi equals the circumference divided by the diameter





Pie =3.14

Answer:

PIE means persuade inform and entertain

Step-by-step explanation:

-4h - 2 = -6h - 8 i need all the steps pls!!

Answers

Answer:

h=-3

Step-by-step explanation:

-4h-2=-6h-8

+6h     +6h

2h-2=-8

   +2  +2

2h=-6

h=-3

Pls help me pls will mark brainliest

Answers

Answer:

69.08

Step-by-step explanation:

The circumference of a circle is given by 2*pi*r

If the radius is 11 m, then:

C = 2 * pi * 11 = 22 * pi = 69.08 m

Help please! I need help

Answers

How do you need help...what is it that you need to figure out

Answer:

if your talking about the point after 6 then it would be 3

Step-by-step explanation:

how would i answer this?: Evaluate 3t + 22 when t = -17

Answers

Answer:

Step-by-step explanation:

you substitute -17 for t

3x-17=-51

-51+22=-29

someone help ASAP I need the find the graph equation for this question

Answers

Answer:

In order to find the graph equation, we can use the points given:

(0,1) (-1,4) (1,-2)

(slope between (0,1) (1,-2): -3)

y = mx + b or y = -3x + 1

need help!!!!! hurryyy

Answers

hey ur ans is correct

28 is correct ans

tysm for question

Answer: You are correct its 28.

Step-by-step explanation:

2^4=16

16+12=28

is this a function or not

Answers

Answer: neither are functions

Step-by-step explanation:

PLEASE HELP ASAP:


1) What is the measure of ⦣4?

2) How many degrees are in a triangle?

3) What is the measure of ⦣8?

4) What is the measure of ⦣5?

5) If the measure of ⦣9 = 9x + 27, what is the value of x?

6) What is the measure of ⦣1?

7) Supplementary angles will add up to...

8) What is the measure of ⦣3?

9) What is the measure of ⦣6?

10) What is the measure of ⦣2?

11) If you add together the degrees from ⦣1 and ⦣2, they will equal..

Answers

Answer:

1. <4=115 degrees

2. 180 degrees

4. 5 degrees

6. 110 degrees

7. 180 degrees

8.65 degrees

Step-by-step explanation:

Han drinks three gallons of iced tea each day. Each gallon of iced tea contains ¾ cups of sugar. How much sugar does Han drink when drinking her iced tea each day?

Answers

Answer:

3 cups of sugar.

Step-by-step explanation:

Han drinks 3/4 of a cup of sugar each day when she drinks iced tea. She drinks 3 gallons, and each contains 3/4. If each contains only 3/4, we will have to multiply 3/4 by 3 gallons to find our answer to this question.

[tex]\frac{3}{4} = 1 \text{-gallon}[/tex]

So, now we will have to multiply 3/4 by the number 3.

[tex]\frac{3}{4}[/tex] × [tex]3[/tex] = [tex]\frac{12}{4}[/tex]

12/4 is equal to 3, so the answer is 3.

how can I solve this problem ​

Answers

Answer:

50

Step-by-step explanation:

the angle that they want you to find is complementary to the angle that equals 40. Complementary means they will add up to equal 90. 90-40=50 so ADB = 50

What inverse operation should be used to isolate the variable in the equation j ÷ 12 = 50?

Answers

Answer:

600

Step-by-step explanation:

50x12=600 you can check this by doing 600/12=50

Answer:

multiplication

Step-by-step explanation:

by multiplying the variable, j, by 12 it isolates the variable.

Which is an example of a function?


the price of a movie ticket and the height of the customer

the price of a piece of cloth and the length of the cloth

the time it takes to mow a lawn and the age of the person mowing the lawn

the distance to school and the time you spend at school

Answers

Step-by-step explanation:

the price of a piece of cloth and the length of the cloth

What equation is being graphed here?

A. y-3= -2/3(x+1)
B. y-4= -3/2(x+2)
C. y-1= -3/2(x+3)
D. y+1= -2/3(x+1)

Answers

Pretty sure it’s D.

Help This isnt super hard but yeah

Answers

Answer:

Kappa

Step-by-step explanation:

The y-intercept is the start weight. Mochi is 1 and Kappa is 2.

Hope this helps.

Kappa is heavier. He weighed 2 pounds at birth, while Mochi weighed only 1 pound

solve for u 5u + 9 - 4u = 17 (also don't have the answer be a fraction)

Answers

Answer:

=8

Step-by-step explanation:

Answer:

u=8

hope this helps

Step-by-step explanation:

8m = 3.2

Solve for m

Please show steps thanks so much

Answers

Answer:

0.4

Step-by-step explanation:

8m = 3.2

divide both sides by 8

m = 0.4

Answer:

m=0.4

Step-by-step explanation: i got it right on my test

Imagine you are painting a series of towers built from cubes. You are going to paint only the exposed faces of the cubes. What is the dependent variable?
a. The amount of paint you'll need
b. The number of stories of cubes
c. The number of corners on the cubes
d. The number of exposed faces​

Answers

A. Because the paint depends of the cubes
(I’m pretty sure)

Will mark brainliest! Determine whether the rectangles are similar. If so, write the similarity
ratio and a similarity statement.

Answers

The similarity ratio is 3/5.
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