MATHEMATICS MIDDLE SCHOOL

Simplify:6m + 7n + 5m – 3n

A.
11m + 4n

B.
m + 10n

C.
11m + 10n

D.
15mn

Answers

Answer 1

Answer: 6m + 7n+ 5m -3n

= 6m +5m + 7n - 3n
=11 m + 4n

therefore , the correct answer is option ( A )

Answer 2

Answer:

Answer:

11m + 4n

Step-by-step explanation:

6m + 7n+ 5m -3n

= 6m +5m + 7n - 3n

=11 m + 4n

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A population of 550 rabbits is increasing by 7.5% each year. In about how many years will the population be over 1000? A.) 9 years B.) 5 years C.)7 years D.)15 years
Paul owes Paula 35 cents and has a pocket full of 5-cent coins, 10-cent coins, and 25-cent coins that he can use to pay her. What is the difference between the largest and the smallest number of coins he can use to pay her?
True or false:x/3 is equivalent to 1/3x.explain your reasoning.
What is 7 divided by 2/3? (Need this done quickly)

Write this in y=ax^2+b form:

y=(x-5)^2 - 2

Answers

Expand (x - 5)^2

(x - 5)^2 = (x - 5)(x - 5)

Multiply all the terms in the first parenthesis to all the terms in the 2nd:

x * x = x^2
x * -5 = -5x
-5 * x = -5x
-5 * -5 = 25

So we have:

x^2 - 5x - 5x + 25

Combine like terms:

x^2 - 10x + 25

Plug it back in:

y = (x - 5)^2 - 2

y = x^2 - 10x + 25 - 2

Combine like terms:

y = x^2 - 10x + 23

$y=(x-5)^2-2\ny=x^2-10x+25-2\ny=x^2-10x+23$

Jesse drives 500 miles in 10 hours. what is the unit rate?

Answers

All the necessary information's are already given in the question. Based on these information's the answer to the question can be easily deduced.
In 10 hours Jesse drives = 500 miles
Then
In 1 hour Jesse drives = 500/10 miles
= 50 miles
So the unit rate of Jesse is 50 miles per hour.

The Track Team has 72 water bottles. They pack them 10 to a box. How many boxes do they fill? How many water bottles are left over?

Answers

10 x 7 = 70 ( water bottles each box )

= 2 more left overs ( 72 water bottles in total )

How many boxes did they fill?

They filled 7 boxes.

How many water bottles are left over?

There are 2 more water bottles that are left over.

Pizza is 11% of the price of the pizza. About how much money will he makein tips if he delivers $452 worth of pizza? *

Answers

Answer:

$49.72

Step-by-step explanation:

The amount in tips the pizza delivery guy will make would be equal to 11% of $452 or $49.72

Write a quadratic equation whose roots are 1+8i and 1-8i

Answers

If 1+8i and 1-8i are the equation's roots, then the quadratic equation is

x² - 2x + 65 = 0.

What is meant by Quadratic equation?

A quadratic equation is written in standard form as y = ax² + bx + c, where a, b, and c are simple numbers. A quadratic equation's factored form is denoted by the expression y = (ax + c) (bx + d), where a, b, c, and d are simple numbers.

Any quadratic problem can be solved using the quadratic formula. The equation is first changed to have the form ax² + bx + c = 0, where a, b, and c are coefficients. After that, we enter these coefficients into the following formula: (-b ± √(b² - 4ac)) / (2a).

If 1+8i and 1-8i are the equation's roots, then:

x - (1 + 8i) = 0 and x - (1 - 8i) = 0 then we get

x - 1 - 8i = 0 and x - 1 + 8i = 0

⇒ (x - 1 - 8i)(x - 1 + 8i) = 0

⇒ x² - x + 8ix - x + 1 - 8i - 8ix + 8i + 64 = 0

⇒ x² - 2x + 65 = 0

The quadratic equation is x² - 2x + 65 = 0.

To learn more about quadratic equation refer to:

brainly.com/question/1214333

#SPJ2

Answer:

$x^2-2x+65=0$