Mathematics Middle School

Two times one number added to three times a second number is 21. Five times the first number added to three times the second is 30. What are the numbers?

Two Times One Number Added To Three Times A Second Number Is 21. Five Times The First Number Added To

Answers

Answer 1

Answer:

d. 3 and 5

Step-by-step explanation:

the first number will be x and the second number will be y

2x + 3y = 21

2(3) + 3(5) = 21

6 + 15 = 21

5x + 3y = 30

5(3) + 3(5) = 30

15 + 15 = 30

Answer 2

Answer:

The answer is D

Step-by-step explanation:

Related Questions

PLZZZZ HELPPPPP there’s 2 answers!

Answers

Answer:

D

B

Step-by-step explanation:

PART A: 1 pound = 16 oz 7pounds= 112 oz. 112 oz+6 =118

Part B: 6pound = 96oz 96+14=110 118-110=8

+

:

Answer:

b and c

Step-by-step explanation:

Can someone please help me with this?

Answers

It’s not letting me click on the picture to see the question

The radius is ___ cm.
O A.) 3
O B.) 7/4
O C.) 7/2
O D.) 7

The circumference in terms of π is ___ π cm.
O A.) 7
O B.) 7/4
O C.) 7/2
O D.) 14

Using 3.14 for π, the approximate circumference of the circle is ___ cm.
O A.) 7.0
O B.) 11.0
O C.) 22.0
O D.) 21.0

Answers

number one is b, number two is c, number three is a??

can anyone help pls i need help?!?! Mr. Gonzalez ran a marathon in 4hr. 25 min. How many seconds did it take for him to run the full marathon?

Answers

Answer:

14550 seconds

Step-by-step explanation:

Answer:

18940 seconds

Step-by-step explanation:

Simplify the following expression.
5 + 18 Divide 3^2
A. 8
B. 7
C. 18
D. 23

Answers

Answer:

D.

Step-by-step explanation:

3^2=9

5+18=23

23/9

2 5/8 <----- answer if u need to solve

Answer:

7

Step-by-step explanation:

3*3=9

18/9=2

5+2=7

BRAINLIEST INCLUDED!!!! Elena went to a sporting goods store that was having a sale. She bought a tennis racket and 3 cans of tennis balls. The tennis racket normally costs $43. All tennis rackets are marked down 15%. One can of tennis balls normally costs $4. The tennis balls are not marked down. The sales tax rate is 8.5% How much will she pay for everything, including tax?

Answers

Answer:

She will pay $52.68, including taxes

Step-by-step explanation:

One can of tennis ball is $4 and there are no discount on it. Elena bought 3 cans, so:

can = 3 x 4 = 12

One tennis racket is $43 but it has a discount of 15%:

discount = 0.15 x 43 = 6.45

total racket = 43 - 6.45 = 36.55

Elena will have to pay:

pay = 12 + 36.55 = 48.55

She will also have to pay taxes, which are 8.5% over the price she paid:

pay + tax = 48.55 x 0.085 = 4.13

total to pay = 48.55 + 4.13 = 52.68

Buying 3 can of tennins ball and one racket, Elena paid $52.68, including taxes.

A small zoo is being designed
on 2/3 of an acre of land. The
designers plan to have 30
different animal areas. How
much land will each animal area
have?

Answers

ANSWER:

1/45 of the acre

EXPLANATION:

2/3 divided by 30 is also (2/3)(1/30)

it would be 2/90 which simplifies to 1/45

Plzz help hurry!!!!!!

Answers

Answer:

(-1,-2.5)

Step-by-step explanation:

Please answer the ones i have not!

Answers

Answer: 100 FOR THE 1ST ONE 41 FOR THE SECOND AND 678 FOR THE 3RD

Step-by-step explanation:

Hello!
Multiple Choice. Which of the following fractions is equivalent to (6/15)


2/7

4/10

1/2

1/4

Answers

Answer:

4/10

Step-by-step explanation:

Answer:

4/10

Step-by-step explanation:

Good Luck

Help Me please this is due soon

Answers

Answer:

D

Step-by-step explanation:

dark chocolate takes longer to melt than white chocolate.

the consistency might be the same.. this is one I think.

2w – 10 = -4 what is the answer to this

Answers

the answer is w=3 suwhwuwbaguanwiwnwoanaonaisnsisnsownaianainza

Answer:

3

Step-by-step explanation:

2w - 10= -4

+ 4 + 4

2w = 6

/2   /2

w = 3

-3z - (3z - 2) = 4(z + 3)
Can someone please tell me what to do step by step Pleaseee

Answers

Answer:

z = -1

Explanation:

-3z - (3z - 2) = 4(z + 3)

Expand -3z - (3z - 2): -6z + 2

Expand 4(z + 3): 4z + 12

-6z + 2 = 4z + 12

Subtract 2 from both sides

-6z + 2 - 2 = 4z + 12 - 2

Simplify

-6z = 4z + 10

Subtract 4z from both sides

-6z - 4z = 4z + 10 - 4z

Simplify

-10z = 10

Divide both sides by -10

-10z / -10 = 10 / -10

Simplify

z = -1

- zyxx

yes that's correct^

Help plsss !!! I’m begging !

Answers

Answer:

U.S. Constitution

Step-by-step explanation:

B! The US Constitution. (:

Peter babysits his sister on Monday and Friday. He babysits for his neighbor 40% of the days Monday through Friday. He babysits for his sister and his neighbor on different days. On the weekend, Peter babysits 50% of the days. How many days does Peter babysit each week?

Answers

Answer:

3 days.

Step-by-step explanation:

x/5=40/100

Find x

200/100=2 days

x/2=50/100

Find x

100/100=1 day

1+2= 3 days.

Can someone help me????

Answers

Answer:

I don't have enough info to understand the question?

Step-by-step explanation:

Is the given value a solution to the equation?



9m − 19 = 3m + 1



m = 10/3

Answers

Yes.
9m-3m=1+19
6m=20
m=20/6=10/3
The answer is 54 hope this is right I did all the math

5 STARS, BRAINLIEST, & THANKED FOR THE FIRST CORRECT ANSWER!!
Solve the system of equations using the elimination method.

3x + 2y = 14

2x + 4y = 12

Answers

ANSWER
x= 4
y= 1
hope this help ma
3x + 2y = 14
3x = 14 - 2y
3x = 12y
3x/3 = 12y/3
x=4y

2x+4y = 12
2x = 12-4y
2x = 10y
2x/2= 10y/2
x=5y

50 POINTS AND BRAINLIEST PLS ANSWER FAST AND EXPLAIN YOUR ANSWER!!!!
PART A: The sun produces 3.9 ⋅ 10^33 ergs of radiant energy per second. How many ergs of radiant energy does the sun produce in 1.55 ⋅ 10^7 seconds?

PART B: Which is the more reasonable measurement of the diameter of a human hair:
1.8 ⋅ 10^−2 mm or 1.8 ⋅ 10^2 mm? Justify your answer.

Answers

Answer:

a. 0.48

b102mm

Step-by-step explanation:

Answer:

Part A. 5.85 · 10^40 ergPart B. 1.8 ⋅ 10^−2 mm

Step-by-step explanation:

Part A

Multiply the numbers and find the product:

3.9 ⋅ 10^33 × 1.55 ⋅ 10^7 =3.9 × 1.5 · 10^(33 + 7) =5.85 · 10^40Part B1.8 ⋅ 10^2 mm = 1.8·100 mm = 18 cm is too much for the human hair

Therefore more reasonable number is:

1.8 ⋅ 10^−2 mm

how many inches are in 4 yards

Answers

Answer:

144 inches

Step-by-step explanation:

There are 144 inches in 4 yards

Plzzz help hurry zoom in to see!?!!

Answers

Answer:

point U

Step-by-step explanation:

Answer:

It's point U

Step-by-step explanation:

Solve for x
x + 4 =9

Answers

Answer:

x = 5

Step-by-step explanation:

9-4=5

Answer:

x = 5

Step-by-step explanation:

x + 4 = 9

9 - 4 = 5

5 + 4 = 9

What steps would you follow to graph the inequality statement? -4 ≥ -w

place an open circle on -4 and shade to the left
place a closed circle on -4 and shade to the right
place an open circle on 4 and shade to the left
place a closed circle on 4 and shade to the right

Answers

Answer:

Place a closed circle and shade to the right

Write an equation in slope-intercept form of the line that passes through the given point and is parallel to the graph of the given equation.

(4, 2); x = -3

Answers

I got y = -3x + 14 as the answer

Answer:

He is right  y = -3x + 14

Step-by-step explanation:

........................................................................Lol

Answers

Answer:

0.33

Step-by-step explanation:

Answer: 21

Step-by-step explanation: We can use the method: Keep, Change, Flip.

1. Keep 7.

If you want 7 to become a fraction, you can do it like this: [tex]\frac{7}{1}[/tex]

2. Change division to multiplication.

It's very simple. Just change the sign.

3. Flip [tex]\frac{1}{3}[/tex].

It's like converting it into a improper fraction. [tex]\frac{1}{3}[/tex] is now [tex]\frac{3}{1}[/tex].

Now we can solve!

[tex]\frac{7\times3}{1\times1} =21/1[/tex]

Therefore, your answer is 21/1 or just 21.

List all the possible measurements for rectangles with a perimeter of 16.

Answers

Answer:

the possible answers are...

16/2=8, so...

1x7

2x6

3x5

4x4

you can finish from here

Step-by-step explanation:

Answer:

6 6 4 4/ 7 7 1 1/ 5 5 3 3/ then just those but backwards.

NEED ANSWER (CORRECT ANSWER)

Answers

Answer:

44

Step-by-step explanation:

range=max value-min value

140-96=44

Jack's father is 3 times older than jack. 5 years ago the sum of their ages was 34. How old is jack's father now?
PLS HELP ASAP!!!!

Answers

Answer:

11. Jack is 11

Step-by-step explanation:

he is 11 years old. ........

DONT DO IT JUST FOR THE POINTS!!!! PLZ EXPLANE HOW TO DO IT WILL GIVE BRAINS

Answers

Answer:

So all the lengths of the sides have to be equal in an equalateral triangle.

Step-by-step explanation:

Each side is going to equal 15. I found this by adding all the numbers together and deviding them by 3 (the number of sides).

I can't help you much more than that, but I hope it helps. ◑﹏◐

Answer:

i dont get it

Step-by-step explanation:

What is the estimate for each expression? Drag the number to each box.

Answers

Answer

1. 1/2

2. 1

3. 0

Answer:

1/8 + 2/5 = 1/2

13/14 - 1/10 =  1

1/12 + 1/20 = 0

Other Questions
2. A Good Day for a Bad DecisionHave you ever noticed that some people always seem to make the right choices? They may be the person who always picks the right pitch to swing at, or the one who always picks the pair of shoes that quickly become a popular fad. On the other hand, some people never seem to make a good decision. They may be the kids who ride a bike down a steep hill and crash into a bush or the ones who step to the edge of a sidewalk in time to get splashed by a car. How do some always seem to be living the good life while others seem doomed to misery? Is this just a matter of luck?While luck probably has something do with it, the better explanation may be that the two groups have differences in the development of their brains. You see, most adult humans use their cerebral cortex to make decisions. The cerebral cortex is the part of the brain in the front of your head that deals with how you perceive the world and respond appropriately. It also helps you control your impulses. This part of the brain is still growing and developing connections well into your adult years. So for young adults and teenagers, the decision-making center of the brain is not completely formed yet.At the same time, the teenage brain is also experiencing growth in another part of the brainthe amygdala (a-mig-dala). This part of the brain is responsible for emotions. Specifically, the amygdala talks to other parts of the brain about events related to rewards and fear.In essence, our emotional brains are having growing spurts and our impulses are out of control at the same time our cerebral cortexes are not finished growing. We simply don't have the tools to control those emotions and impulses. As a result, teenagers feel overly emotional and wishy-washy when it comes to decisions. This development cycle is one reason society doesn't consider children to be adults until after they are 18. Biologically, the teenage brain is not generally ready for adult decisions.So the differences between those who seem to make good decisions and those who seem to make bad ones may be fewer than you think. In fact, if you study the people you think make only good decisions, you will likely find they also make some catastrophically bad ones as well. A person's ability to make a good decision increases with age and experience though we all develop at different rates. While you are young, you may want to take advantage of those around you with bigger cerebral cortexes: adults. Their advice may be just what is needed to counter your amygdala.Which line from the text best states the main idea of the text? 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