MATHEMATICS MIDDLE SCHOOL

(2x^3+4x^2-3)+(6x^3+4x-4)
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Answers

Answer 1
Answer:

Answer: everything is explained in the picture

Step-by-step explanation:
Answer 2
Answer:

Answer:

8x^3 + 4x^2 + 4x -7

Step-by-step explanation:

Add like terms.

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The Hu family goes out for lunch, and the price of the meal is $49. The sales tax on the meal is 7%, and the family also leaves a 20% tip on the pre-tax amount. What is the total cost of the meal?

Answers

Answer:

50 balls

Step-by-step explanation:

First divide 10 by 2=5x10

Is 7/20 equivalent to 7 hundreds

Answers

No. 7/20 is NOT equivalent to 7 hundreds or 7 hundredths.

7 hundreds is 700 in standard form.

7/20 will become a decimal number. It is equal to 0.35

0.35 is not equal to 700.

7 hundredths in decimal form is 0.07

0.35 is still not equal to 0.07.

I need help with some maths homework what is the answer 3(x-3)=0

Answers

if xy=0
assume that at least x or y=0

3(x-3)=0
therefor
3=0 or x-3=0
3=0 is false
therefor
x-3 mus equal zero
x-3=0
add 3 to both sides
x=3
you would  have to use distributive property. it would come out to 3x-9=0 then you would add 9 to -9 and 0. It would then be 3x=9. You would then divide 9 and 3x by 3x. You will get x=3.

True or False:​
​ A triangle can be constructed with side lengths of 5 inches, 7 inches, and 13 inches.
​
​Sketch on the scratchpad an explanation that supports your answer.

Answers

Answer:

no it can't because

Step-by-step explanation:

coz the sum of any two angle should be greater than 3rd side

  • 13 + 5 = 18 which is greater than 7
  • 13 + 7 = 20 which is greater than 5
  • 5 + 7 = 12 which is not greater than 13

so triangle cant be made

Answer:

FALSE

Step-by-step explanation:

BECAUSEEEEEE THATTTTTS THEEE ANSWERRR

What number solves the equation 11x + 7 = 73?

Answers

you do 73 -7=66 then do 66÷11=6 with make x=6

Answer:

x=6

Step-by-step explanation:

11x + 7 = 73

11x+7-7=73-7

11x=66

11x/11=66/11

x=6

How to solve how many 3/4s are in 2 with multiplication

Answers

Answer:

If you divide first (2 ÷ 3/4) just multiplu when you check your math.
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