Mathematics Middle School

Which is an equivalent expression of:
−2(5r+ 3) + 9r?
A) −19r – 3
B) −10r – 6
C) −10r+ 3
D) −r– 6

Answers

Answer 1

Answer:

-r - 6

Step-by-step explanation:

use distributive property

-2(5r + 3) +9r

= -10r - 6 +9r

= -r - 6

Answer 2
The answer would be d

Related Questions

estor works at a garden center where he plants flowers. It takes him 2 1/2 hours to plant 15 flowers.

If Nestor continues working at the same rate, how many flowers will he be able to plant in 3 1/2 hours?





1Points
A
18 flowers

B
21 flowers

C
22 flowers

D
26 flowers

Answers

Answer:

b

Step-by-step explanation:

convert 2 1/2 hours into minutes to be easier to work with

15 / 150 = 10 minutes

every 10 minutes he pots a plan.

there are 210 minutes in 3 1/2 hours

210 / 10 = 21  

The answer is B because he plants one each 10 minutes and there is 210 minutes in 3 1/2 hours 210/10=21

rewrite 1/2 x 1/2 as an exponential expression with a base of 2

Answers

Answer:

2^-2

Step-by-step explanation:

According to the properties of integer exponents, 1/a^n = a^-n.

So 1/2 x 1/2 = 1/2^2 = 2^-2.

1/2 x 1/2 can be rewritten as the exponential expression 2^-2.

Edmentum answer

The expression 1/2 × 1/2 can be written as 2⁻² in the exponential form with the base 2.

What are Expressions?

Expressions are mathematical statements which consist of two or more terms and terms are connected to each other using mathematical operators like addition, multiplication, subtraction and so on.

Given expression is 1/2 × 1/2.

We have to write the expression in an exponential form with the base 2.

1/2 × 1/2 = (1/2)²

             = 1 / 2²

We have the rule for exponentiation 1 / aᵇ = a⁻ᵇ

1/2 × 1/2 = 2⁻²

Hence the exponential form of the given expression with the base 2 is 2⁻².

To learn more about Exponential Expressions, click :

https://brainly.com/question/26540624

#SPJ2

I NEED HELP WITH 11-16 PLSSSSSS HELP ME ILL GIVE YOU BRAINLIESTTTTTTTT

Answers

11) 4

12) $6.66 a min

13) 25¢

14) Alexander

15) C. 22.50

16) C

Answer:-5

Step-by-step explanation:

A triangle has an area of 18 square feet. The height is 6 feet. What is the length of the base (in feet)?

Answers

Answer:

6 because the type is v×h:2

Answer:

3 feet

Step-by-step explanation:

PLEASE HELP IM ALMOST DONE

Answers

Answer: 33

Step-by-step explanation:

math again

Answer:

A is the correct answer

Step-by-step explanation:

Please help me I have to have it done today!
Correct answers please because this is a big part of my grade but i don't understand!

Answers

Answer:

I couldn't figure out the very first one at the very top, but here are the rest

Step-by-step explanation:

The first one is No, because  f one equation has subtraction, and the other has addition, your going to come out with different outputs. Then number 3 is 372.43. and the last one is 46 - 2.5 which equals 43.5

Answer:

I couldn't figure out the very first one at the very top, but here are the rest

Step-by-step explanation:

The first one is No, because  f one equation has subtraction, and the other has addition, your going to come out with different outputs. Then number 3 is 372.43. and the last one is 46 - 2.5 which equals 43.5

15 POINTS TO PEOPLE WHO ANSWER CORRECTLY WITH EXPLINATION
6.Henry can finish painting a fence in 8 hours. John can finish painting the same fence in 12 hours. If they work together for 4 hours, how much of the fence is left unfinished?

Answers

They have finished 1/2+1/3=5/6. Explanation, if Henry finished in 8 hours that means he is halfway done because of 4 hours, for John he has finished 1/3 because 4/12 is 1/3. Let me know if you need anymore

Which graph shows the information in the table?

Calories in Salad Dressing
Number of Ounces of Salad Dressing
Total Calories
2
300
3
450
4
600
5
750
On a coordinate plane, the x-axis is labeled ounces of salad dressing and the y-axis is labeled Total calories. A line goes through points (2, 300) and (4, 600).
On a coordinate plane, the x-axis is labeled ounces of salad dressing and the y-axis is labeled Total calories. A line goes through points (300, 2) and (600, 4).
On a coordinate plane, the x-axis is labeled ounces of salad dressing and the y-axis is labeled Total calories. A line goes through points (1, 200) and (2, 300).
On a coordinate plane, the x-axis is labeled ounces of salad dressing and the y-axis is labeled Total calories. A line goes through points (200, 1) and (300, 2).

Answers

Answer:

i notice something 300 you just adding 150

Step-by-step explanation:

Answer:

b

Step-by-step explanation:

Which sums are equal to -8 + 17? Select all that apply

A -(8 + 17)
B 17 + (-8)
C -8 + 8 + 9
D 8 + (-17)
E -8 + (-17)
I will give Brainly! Pls help!

Answers

Answer:

B and C

Step-by-step explanation:

A = -25

B = 9

C = 9

D = -9

E = -25

Answer: b and c

Step-by-step explanation:

-8+17= 9

a. -(8+17)= -25

b. 17+(-8)= 9

c. -8+8+9= 9

d. 8+(-17)= -9

e. -8+(-17)= -25

hope this helps!

Hello everyone I hope your doing well, I'm having trouble with school at the moment. I have loads of assignments and I need to finish them today. I will have more of these so if anyone is willing to help with all of these please send me a email

Answers

27.5 miles 110 miles in 2 hours divided by 4 gives you your answer

Answer:

A is 55 ÷2=27.5? because 1 is 5 5 so to get 1/2 you will half the first one

Solve for r.
-13 = r/9 + 8

r = ???

Answers

Answer:

r= -189

Step-by-step explanation:

Answer:

r= -189

Step-by-step explanation:

You subract the 8 both sides:   -13= r/9+8

Which equals to: -21= r/9

In order to get the 9 off, you have to cancel it by multiplying ( opposite of   is multiplying) both sides:

9(-21)= r

And the final answer is:  r= -189

You can check it by plugging in -189 to r and it works:)

Your welcome:)))

How did American factories change during World War II to support the war effort?

Answers

Step-by-step explanation:

Many Factories were converted into ammunition factorys and weapon factorys to support the war effort

It has many supplying

a fruit salad contains 20 different pieces of fruit. there are 3 pieces of apple, 8 pieces of watermelon, 7 pieces of banana, and the rest are orange pieces.

Answers

there are 2 oranges, if that’s what the question was?
apple to banana ratio

3:7



Orange to the total pieces

2:20 or 1:10

what is the square root of pi
oh its 1.77245385091 so dont answer

Answers

Answer:

3.14159265358

Step-by-step explanation:

1.77245385091 square

What is the missing side length?
(Use Pythagorean Theorem)

Answers

Answer:

20 units

Step-by-step explanation:

The Pythagorean Theorem states that:

                                [tex]a^{2} + b^{2} = c^{2} \\[/tex]

Now we can insert values into the equation.

                                      [tex]a = 15\\b = b\\c = 25\\[/tex]

Now we can plug these ☝ values into the Pythagorean Theorem:

                                  [tex]15^{2} + b^{2} = 25^{2}\\[/tex]

After we solve for [tex]b[/tex] we get:

[tex]b^{2} = 400\\b = 20[/tex]

Answer:

b = 20

Step-by-step explanation:

15 + b = 25

(you have to square each one)

15 x 15 = 225

b x b = b

25 x 25 = 625

625 - 225 = 400

[tex]\sqrt{400}[/tex] = 20

hope this helps

At a school health fair, individual pieces are places in paper bags and distributed to students randomly. There are 20 apples, 15 apricots, 25 bananas, 25 pears and 30 peaches. What is the probability of getting an apple?***Hint: Reduce

A. 19/23
B. 4/23
C. 20/100
D. 1/2

Answers

Answer:

B

Step-by-step explanation:

A) 20/115 so the probability is 4/23
B)90/115 so the probability is 18/23
C)95/115 so the probability is 19/23
D) is impossible because there are no oranges

A motorboat, that has speed of 10 km hour in still water, left a pier traveling against the current of the river. Forty-five minutes after the boat left the pier, the motor of the boat broke, and the boat began drifting with the current. After three hours of drifting with the current, the boat was back at the pier where it had started. What is the speed of the current of the river?

Answers

9514 1404 393

Answer:

  2 km/h

Step-by-step explanation:

  distance = speed × time

The boat's progress upriver can be modeled by ...

  (10 -c)(3/4) +(0 -c)(3) = 0

  7.5 -3.75c = 0 . . . . simplify

  2 -c = 0 . . . . . . . . . divide by 3.75

  c = 2 . . . . . . add c

The speed of the current is 2 km per hour.

A company gives yearly raises to their employees. The salaries at the company are based on the equation below, where S is the salary before taxes and t is the time since the date of hire in years.

S = $33,113 + $600t

What is the minimum number of years an employee would have to stay to make a salary of over $40,000 per year?

Answers

Answer:

An employee would have to work 20 years in order to receive an annual pay of $45,000

evaluate the inequality below and select the correct solution -9x + 3 -2
A. x > -2
B. x -6
D. x < -6

Answers

Answer:

A

Step-by-step explanation:

I will give brainliest!

Answers

A is the answer ......

if someone could help me with this that would be great!!! TYSM

Answers

Answer:

1005 ft squared (B)

Step-by-step explanation:

The far left area:

30*15=450

The middle area:

-Since there is an eight feet being subtracted it is:

22*15=330

The last side:

-Since there is two 15's at the bottom we must subtract 30 from 45:

15*30*1/2=225

Add the area together:

450+330+225=1005

1005 ft squared

He is right it is 1005 ft sq

please help i’m doing pythagorean theorem and don’t understand this please explain ty!

Answers

Answer:

Hypotenuse

Step-by-step explanation:

Base ² + perpendicular ² = Hypotenuse ²

in short we write H² = P² + B²

Hope this helps you.

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