Mathematics Middle School

a+b=20
1.5a+1.25b=28

what do a and b stand for

Answers

Answer 1
a=20-b (1)
1.5a+1.25b=28 (2)
Sub 1 into 2
1.5(20-b)+1.25b=28
30-1.5b+1.25b=28
-0.25b=28-30
-0.25b=-2
b=-2/-0.25
b=8
—————-
a=20-8
a=12
Answer 2
A= 12 and B= 8
Because 1.5•12= 18 so then take 1.25•8= 10 then add 18+10 which equals 20 when added together

Related Questions

10 points Questions on tests be like



Frank has two apples and he gives his friend one apple what is the square root of the sun if the universe exploded?

Answers

that is so true annfndndncjwjndekcja
Byoceuvtixerc disculpa

What is the answer to this question?
(2p-2)(2p+2)

brainliest to rigth answer

Answers

Answer:

42−4

Step-by-step explanation:

2−2)(2+2)

Simplify

Distribute

(2−2)(2+2)

2(2+2)−2(2+2)

Distribute

2(2+2)−2(2+2)

42+4−2(2+2)

Distribute

42+4−2(2+2)

42+4−4−4

Combine like terms

42+4−4−4

42−4

Solution

42−4

I’ll give Brainly!! And a heart!!!


Please help there is a picture!!

Answers

Answer:

I think it it c but I am not sure

Step-by-step explanation:

Answer:

B.

Step-by-step explanation:

Because it is a small part of the people, and It is selected by chance. I hope it's correct.

Math probelm help me Asap! its unit rate PART 2 sorry that i didn't post the pic last time
THERES A PICTURE OF THE PROBLEM
15 points for the CORRECT answer.

Answers

$0.20

Step- by -step
5 / 1 =0.2

if u show your work u will get brainliest

Answers

Answer:

C

Step-by-step explanation:

Adding all the values up gives you $1.70, divide the total by 10 gives you the mean, which is $0.17

The answer is letter C

Greg is running a marathon. While running, he should drink 21 ounces of water per hour. If he runs for 3 hours, how much water should he drink?

Answers

Answer:

63 ounces

Step-by-step explanation:

21x3=63

The question asked “per hour” and it also says he should drink ___ amount of water per hour. The question gives you the time and amount that you need to multiply. So the answer is 63 because you multiplied the time by how much he drinks (3x21=63)

SOMEONE PLS HELP MEE ASAPPP!!

Juan bought some cans of paint and 2/3 of a litre of special paint additive formulated to reduce mildew. Before painting his house, he used all of the additive to put 1/3 of a litre of additive in each can. How many cans of paint did Juan buy?

Answers

I think you would just add 2/3 and 1/3 to get 1 full can of paint. If not sorry.

3/6 I hope that can help you

Find the surface area of the cylinder. Round to the nearest whole number.
A. 553 cm2
B. 1,359 cm2
C. 1,790 cm2
D. 730 cm2

Answers

Answer:

I think it is 730

Step-by-step explanation:

I hope this helped o(〃＾▽＾〃)o

D. Sorry if incorrect

Question
Calculate the volume of the prism by first finding the total number of half-unit
cubes that will fill it. There are 8 half-unit cubes in every unit cube.
O A. Number of half-unit cubes = 5
V=1 cubic units
O B. Number of half-unit cubes = 10
V=12 cubic units
OC. Number of half-unit cubes = 10
V = 5 cubic units
O D. Number of half-unit cubes = 5
V = 2) cubic units

Answers

Answer:

B

Step-by-step explanation:

the way they are explaining the problem doesnt quite make sence, but from what i can tell...

the volume of the cube is 1 1/4, i came up with this because i used the method of multiplying width by height by length

1/2 * 1 * 2 1/2 = 1 1/4

so if theres 8 half unit cubes per unit cube, then we can take the two numbers given to us and divide them by 1 1/4 or 1.25 in decimal

5 / 1 1/4 = 4

10 / 1 1/4 = 8

so your answer is B

The answer is b anyways have a good day

Write the equation of the line in slope-intercept form using y=mx+b​

Answers

Answer:

y = -1/2x

Step-by-step explanation:

Answer:

y = -0.5x + 0

y = -0.5x

Step-by-step explanation:

Kaitlyn has a bag with an equal number of red, yellow, and blue marbles. She makes a tree diagram to show the sample space if she randomly selects two marbles out of the bag.
What is the probability that both marbles selected are different colors?
[diagram in the picture]

Answers

Answer:

6/9

Step-by-step explanation:

there are the possibility that she takes different colors six times in 9 different possible results

The probability that both marbles selected are different colors is 2/3.

What is the probability?

Probability can be defined as the ratio of the number of favourable outcomes to the total number of outcomes of an event.

We know that, probability of an event = Number of favourable outcomes/Total number of outcomes.

Given that, Kaitlyn has a bag with an equal number of red, yellow, and blue marbles.

From tree diagram, we have {RY, RB, RR, YR, YB, YY, BR, BY, BB}

Here, the probability = 6/9

= 2/3

Therefore, the probability that both marbles selected are different colors is 2/3.

To learn more about the probability visit:

https://brainly.com/question/11234923.

#SPJ3

can someone please help me with these 5 questions
first one. -5x + 2 - 8x + 9
second one. 5x + 8 + 2 + 3x
third one. 1x + 9x + 4 + 4
fourth one. 6 - 7x + 9 - 2x
last one. 14 - 4x + 3 - 1x

Answers

Answer:

1. -13x + 11

2. 8x + 10

3. 10x + 8

4. -9x + 15

5. -5x + 17

Step-by-step explanation:

In the first problem, you have to do -5x + -8x which is -13x. Then you add 2+9 which is 11. You will get the expression -13x + 11.

In the second problem, you have to do 5x + 3x which is 8x. Then you add 8 + 2 which is 10. You will get the expression 8x + 10.

In the third problem, you have to do 1x + 9x which is 10x. The. you add 4 + 4 which is 8. You will get the expression 10x + 8.

In the fourth problem, you have to do -7x + -2x which is -9x. The. you add 6 + 9 which is 15. You will get the expression -9x + 15.

In the last problem, you have to do -4x -1x which is -5x. The. you add 14 + 3 which is 17. You will get the expression -5x + 17.

1. -13x + 11
2. 8x + 10
3. 10x + 8
4. -9x + 15
5. -5x + 17

Compounds are molecules that are made up of one or more element. True or false?

Answers

Answer:

The answer should be true

The answer is true I think

Which is a factor of 6?

Answers

6 is a factor of 6

this is because the only number that 6 is divisible by with those answer choices is 6.

hope this helps:)

3/7h=33 ill give brainlyest if i can

Answers

77
step by step explanation

Answer below PLEASE HELP ME PLSSS HELP WILL MARK BRAINLIST

Answers

The temp. in Memphis decreased steadily. The explanation for this is looking at the m line it slowly goes down. The temp. in Lubbock stayed the same, Phoenix’s temp. Was lower then than Memphis’ initially, and New Orlean’s temp. rose much faster than Phoenix’s. Hope this helps :)

Please help pressed for time

Answers

Answer:

1: 1/2 or 1 divided by 2

2:

3:

4:

Step-by-step explanation:

\- x + s q r t 1 − x 2 \- = s q r t 2 ( 2 x 2 − 1 ) \- x + s q r t 1 − x 2 \- = s q r t 2 ( 2 x 2 − 1 ) \- x + s q r t 1 − x 2 \- = s q r t 2 ( 2 x 2 − 1 ) \- x + s q r t 1 − x 2 \- = s q r t 2 ( 2 x 2 − 1 ) \- x + s q r t 1 − x 2 \- = s q r t 2 ( 2 x 2 − 1 ) \- x + s q r t 1 − x 2 \- = s q r t 2 ( 2 x 2 − 1 ) \- x + s q r t 1 − x 2 \- = s q r t 2 ( 2 x 2 − 1 ) \- x + s q r t 1 − x 2 \- = s q r t 2 ( 2 x 2 − 1 ) \- x + s q r t 1 − x 2 \- = s q r t 2 ( 2 x 2 − 1 ) \- x + s q r t 1 − x 2 \- = s q r t 2 ( 2 x 2 − 1 ) \- x + s q r t 1 − x 2 \- = s q r t 2 ( 2 x 2 − 1 ) \- x + s q r t

DO NOT REDUCE Your Answer To The Lowest Terms! What Is 3/4 x 2 and 3/4

Answers

33/16 I’m sorry if it’s wrong

Giving brainliest and thanks

Answers

Answer:

23 tallys all you need to do (form what i was taught ) is add up all the tallys

b

ANSWER: B
THE ANSWER IS B why because 0 is 5 and the bottom is the number of pets people have and the top is tally of the number of people in that category.
1st check if 0 has 5 tallies in all the plots. No it’s not only in B then if you want finish checking it but the answer is B
Hope this helps have a great day!!!

Can someone help me out What is the solution to the system graphed?

Answers

Answer:

1,-2

Step-by-step explanation:

I BELEIVE THAT IS IT BECAUSE IT MEETS AT 1 THEN GOES UP TO -2 WHICH MAKES

1,-2

EXPERT HELP EXPLAIN THE ANSWER:

Answers

Answer: Its B!!!

Step-by-step explanation:

The answer is b I just did the test


Mhydydluduhufhjpjphlb

Answers

the answer is a. your welcome
The answer is d

Explanation: The arrow is pointing to the right hand sign and is also a shaded circle so therefore it will be D since they both point the same direction and also has a shaded circle.

A system of equations is graphed below. What is the solution to the system? Explain how you know.

Answers

the more horizontal line is y=1/3x+3

the other one is y=2x+(-2)

The height of any child in Mr. Diaz's kindergarten class is no greater than 46 inches.
Let h be the height in inches of a child in class. Write an inequality that means that a height is no greater than 46 inches.
I ready math!

Answers

Answer:

h≤46

if the h (height) in not greater than 46 it will either have to be equal to or less than 46in.

PLEASE HELP ME ASAP!
Solve the inequality!
−12x+13>35

Answers

Answer:

x< -1.8

Step-by-step explanation:

-12x+13>35

We leave the variable alone passing the 13 with opposite sign to the other side and subtracting it from 35.

-12x>22

We divide both by the variable, -12x, and it gives x > -1.8. Since the sign of x changed, we flip the sign and the final result is x < -1.8

need this for my teacher

Answers

i believe you combine the first and last terms first because they have the same denominator
combine then and you will get your answer

Pls, hurry!!! Type the number to the left of the rational number in the box to the point it represents on the number line.

Answers

Answer:

1a, 2b, 5e, 4d, 6f, 3c

Step-by-step explanation:

Hope u did good on that # Big Brain

Statistics Practice Q10

Answers

Answer:

B and D

Step-by-step explanation:

I have already did it

the answer is B and D , I took it and got it right

2x+5+3-4x please help me

Answers

Answer:

6x+8

Step-by-step explanation:

Answer:

-2x+8

Step-by-step explanation:

Step 1 - Put like terms together

2x-4x+5+3

Step 2 Combine like terms

-2x+8

this is worth 30 point you will get brainliest if u show work

Answers

Answer:

B

Step-by-step explanation:

Had the Same questions and got it right

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