Mathematics Middle School

Evaluate the expression 2(5x -3y) if x = -1/2 and y = 1

Answers

Answer 1
the answer is -11!
once plugged in, the new equation would be 2(-2.5 -3)
this would equal 2(-5.5)
the final answer would be -11

Related Questions

what is 2+2x 4, Delany answer it please.

Answers

Answer:

10

Step-by-step explanation:

pemdas

please excuse my dear aunt sally

first you 2x4 which is 8 then add 2

Answer:

10

Step-by-step explanation:

Original equation:

2 + 2 · 4 = ?

Multiply 2 by 4

8

Plug this value back into the equation

2 + 8

Add

10

Hope this helps :)

Estimate the percentage: 41 of 122
a. 0.3% c. 43.6%
b. 33.3% d. 3% Explain

Answers

Answer:

33.3%

Step-by-step explanation:

41/122 = approximately 0.333

Multiply this by 100 and you get your percent.

Answer:

b

Step-by-step explanation:

the answer is 33.61 but thats the closest

The figure below shows the quotient of Fraction 2 over 5 divided by Fraction 1 over 10.

Answers

Answer:

3

Step-by-step explanation:3

2/5 / 1/10

2/5*10/1= 20/5

1. The school office is now selling neon mechanical pencils. If the office pays $10.80 for a dozen pencils, how much should be charged to make a profit of 75 cents each?
2. Several cases of 16-ounce bottles of water were purchased for $252.00. If one case costs $7.00, how many cases were purchased?
3. Okolona College ordered jerseys to sell at the homecoming game. The college paid $9.25 each for 225 jerseys. Each jersey was sold for $15.75. What was the percent of markup for each jersey? How much profit was made if all of the jerseys were sold?
4. A truck traveled 654 miles on a long distance run. If the truck averaged 55 mph, how many hours did it take to reach the truck's destination? (Round to the nearest hour)
5. Della Riley borrowed $2400 for 6 months to invest in a business venture. If she agreed to pay 8% interest annually, how much will she be repaying?
6. It takes Dan an average of 45 minutes each evening to do his chemistry homework. Dan calculates that he worked a total of 3 hours on chemistry last week. Assuming that Dan worked his average time per evening consistently, how many evenings did Dan work?
7. Jon's car averages 20 mpg in town and 28 mpg on the road. What is the percent of decrease between the two driving conditions?

Answers

Answer:

1. Each pencil cost .90 cents each. So if they want to make a profit of 75 cents each they will get $9 for a dozen pencils. They must charge 75 cents.

2.  Several means 4 but in this case, it means 36. When you divide 252 by 7 you get 36. Because each case is $7 and the total is 252.

3. The percent markup for each jersey was around 65%. They almost doubled the price by 6.50. They would make $3543.75 if they sold all the jerseys at the homecoming game.

4. The truck took 12 hours to reach its destination.

5. She would be repaying $ 1,152.00 in one year.

I hope this helps. I did not do 6 and 7 because I hope these help you figure those out. : )

Find the angle for a ​

Answers

Answer:

69

Step-by-step explanation:

The answer is 69.

69+52=121

write the range of the function f(x)=-(x+4)^2-3 using set notation

Answers

Answer:

(−∞,−3], {y|y≤−3}

Step-by-step explanation:

Is that a answer choice?

PLS HELP DUE SOON: (basically it's a retest) will give brainliest <3

Answers

The answer is the fourth one
If I’m correct I believe it’s 4.

Are you able to determine the volume of the cube with the information given? (Explain in complete sentences)

Answers

if it is a perfect cube, the volume would be 5•5•5 or otherwise known as 5 to the third power. your answer would be 125
yes because you would be able to do 5•5•5 and you’d be able to find the volume of the cube

A skier can purchase a daily or season pass. The daily pass costs $48 per day and included the price of ski rentals. The season pass costs $190 plus a daily fee of $10 to rent the skis. How many days would a skier have to go skiing in order for both options to cost the same?

Answers

Answer:

19

Step-by-step explanation:

Please help me ASAP!

Answers

Answer:y= 4x-2 and y-2=4(x-1)

Step-by-step explanation:

Answer:The answer in y=4x-2

Step-by-step explanation:

So, 4 is how man units it goes up at a time, -2 is the y intercept where it intercepts the Y axis and x is x Here is how to solve the first ordered pair the equation is 4(-1) -2 so 4 times -1 is -4 -2 so basically it is -4 +-2 so you get -6 so to solve the rest do what i just demonstrated just change x to 0,1,2 ect.

what are two solutions to x < 8

Answers

Answer:

7, 3

Step-by-step explanation:

Any number less than 8 will work.

Answer:

6, 4

Step-by-step explanation:

Any number less than 8 will work

If necessary, use / for the fraction bar. Please reduce to simplest terms

What ratio value is shown by the following double number line? Use / for the fraction bar and do not use spaces.

Answers

Answer:

Step-by-step explanation:

The value is 3

A line passes through the origin and the point (12,9). Identify the slope of the line.

Answers

Answer:

the slope (m) = 3/4

Step-by-step explanation:

Answer:

M=3/4

Step-by-step explanation:

Rise/run

9/12=3/4

whats 5 + 4/23 x -34 Divide by ten is.....
P.s. i have to show my work sooooooo.....

Answers

i would guess bruhh tuff

First, you have to do the multiplication first because pemdas
so 4/23 x (-34) = -136/23
so then do the equation 5 + (-136/23)
after you do that equation the final answer is -21/23

PLEASE IM BEGGING YOU

Answers

Answer:b

Step-by-step explanation:

Rectangle WXYZ with vertices W(-1,4), X(-1,1), Y(5,1), and Z(5,4). What is the perimeter?
HELP PLEASE I WILL GIVE BRAINLIEST TO BEST ANSWER AND 20 POINTS!!!!

Answers

Answer:

umm 14? hold on imma come back:)

Help with these 2 question and I with give 36 points away and brainliest (pics included)... Only 1 & 2 pls

Answers

Answer:

for 1 is B and for 2 is A

Question one is B, and question two is A

Hii finding the slope (there are 3 questions please answer them all)

Answers

Answer:

1 -2/5

2. 3

3. 1/2

Step-by-step explanation:

1 m=y2-y1/x2-x1

-16-4= -20

-6-2= -8

m=-8/20

m=-2/5

The answer is 1. -25

Hope this helps!

Which one is correct

Answers

Answer:

C

Step-by-step explanation:

I think it is strongly let me know if I am wrong

WILL GIVE BRAINLIEST!!!!!

Which would be used to solve this equation? Check all that apply.

subtracting 3 from both sides of the equation
multiplying both sides of the equation by 3
dividing both sides of the equation by 3
substituting 4 for p to check the solution
substituting 36 for p to check the solution

Answers

Answer:

1 3 4

Step-by-step explanation:

umm i suck at explaining sorry

Answer: Multiplying both sides of the equation by 3

substituting 36 for p to check the solution

Step-by-step explanation: To undo the division of p by 3, one multiplies by the inverse of 1/3. That is, one multiplies by 3.

Then you have 3(p/3) = 3(12)

p = 36 simplify

To check this work, you can substitute 36 for p:

36/3 = 12 true statement So, the solution process is multiply both sides of the equation by 3 substitute 36 for p to check the work

the quotient of a number x and 3 is at most 4
an inequality is ?
the solution is ?

Answers

Answer:  The inequality is   x/3 [tex]\leq[/tex] 4   and   x [tex]\leq[/tex] 12

Step-by-step explanation:

The quotient of x and 3 is the same as x/3  and the at most sign is less than or  equal to. x/3 has to be  less than or equal to  4 which can be represented by the inequality,

x /3 ≤ 4            Solve for x by multiplying both sides by 3.

x ≤ 12

3 ¼ X 4=
Step 1 Rewrite (each fraction has a Numberator and a Denominator):

Step 2 (Reduce, solve, simplify):



3/8 ÷ 6/10
Step 1- Write as a Multiplication problem:

Step 2-Reduce fractions (find common factors):

Step 3-Solve:

Answers

Answer = 13

Step by Step:

3 1/4 • 4 = 13/4 • 4 = 13
Answer is 13 well done helper and that how I work things out

Beatrice threw a stone one and seven fourteenths yards. Tilly threw a stone nine fourteenths of a yard. What is a reasonable estimate of the difference between their two throws?

1 yard
one and one half yards
2 yards
two and one half yards

Answers

Answer:

1 yard

Step-by-step explanation:

7/14 is 1/2 while 9/14 is greater than 1/2 but a lot less than a whole. So a strong estimate would assume that it is (1 1/2)-(1/2) for the approximate difference in  their throws were  

The answer would be 1 yards because 1 and 7/14 minus 9/14 is 12/14 which rounds to 1 yard

Katya cut part of the jump rope off to make it shorter. The new length is 8 and StartFraction 1 over 6 EndFraction feet. The difference between the original length and the new length is StartFraction 5 over 6 EndFraction foot. The equation x minus 8 and StartFraction 1 over 6 EndFraction = StartFraction 5 over 6 EndFraction can be used to represent this problem, where x is the original length of the rope. What was the original length of the rope?

7 and one-thirdfeet
8 and two-thirdsfeet
9 feet
10 feet

Answers

Answer:

9 feet it is right

Step-by-step explanation:

SOMEONE PLEASE HELP !!

Answers

Answer: ITS C

Step-by-step explanation:

Pls answer as soon as possible
1st person will be marked brainliest

Answers

Answer:

Two half gallon containers can hold 1 gallon, whic is about 3.785 liters.

Step-by-step explanation

Answer:

Two half gallon containers can hold 1 gallon( 3.785 liters.)

Step-by-step explanation:

A particular type of cell doubles in number every hour. Which function can be used to find the
number of cells present at the end of h hours if there are initially 4 of these cells?

Answers

Answer:

The function would be

.This is in the general form

, where a is the initial value, b is the rate it increases by, and x is the amount of time.  For our function, the initial value is 4 and the rate it increases by is 2.

Step-by-step explanation:

Here is an equation: 4x - 4 = 4x + _____. What could you write in the blank so the equation would be True for one value of x.

o -7

o 19

o -4

o 4x

o 2x

Answers

Answer:

-4

Step-by-step explanation:

:)

The table shows the linear relationship between the number of hours Francis worked, x , and the amount of money Francis earned, y.







Based on the table, how much did Francis earn per hour?

Answers

he earned 14$ and hour, because when you divide 17.5 divided by 1.25 you get 14

Answer:

your awnser would be 14.00$ aan hour

i hope i helped u

Step-by-step explanation:

Mandy makes beaded bracelets and sells them for $5 each. If she sells the bracelets for 250% of the cost of her materials, how much does each bracelet cost to make?

Answers

Answer:

$2.00

Step-by-step explanation:

Just change 250% to a decimal. It becomes 2.5. Then divide 5 by 2.5.

5 / 2.5 = 2!

Hope this helps!

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