MATHEMATICS MIDDLE SCHOOL

Help!!!! Add. 7 2/15+ 5 2/3+ 9 13/15

A.21 2/3
B.20 2/3
C.22 2/3
D.21 10/15

Answers

Answer 1
Answer: 7 (2)/(15 ) + 5 (2)/(3) + 9 (3)/(15)

Convert mixed number to improper fraction.

(107)/(15) + (17)/(3) + (148)/(15)

Then change all the denominators into a same number

(107)/(15) + (85)/(15) + (148)/(15)

Add all the numerators but let all the denominators be same.

(107+85+148)/(15) = (340)/(15)

Change the improper fraction back into a mixed number..

22 (10)/(15) I see that we can still simplify the fraction.. 

22 (10)/(15) = 22 (2)/(3)

Your final answer is C. 22 (2)/(3)

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PLEASE HELP ASAP!!! 70 POINTS AND BRAINLIEST!!!Choose the equation that represents the graph below:
y = x − 3
y = −x + 3
y = −x − 3
y = x + 3

Answers

Answer:

y =x+3

Step-by-step explanation:

We need to find the slope

Find 2 points

(-3,0) and (0,3)

Slope = (y2-y1)/(x2-x1)

          = (3-0)/ (0--3)

          = (3-0)/ (0+3)

           =3/3

            =1

We know the y intercept  ( where it crosses the y axis) is at 3

We can write the equation in the form y= mx+b

y = 1x+3

y =x+3
You should use this app called desmos to solve this but its the last option

What is the surface area of a cube with a side length of 18 meters

Answers

The surface area of a cube: 6a²

a is an edge, which in this case, is 18

6(18²)
18(18) = 324
6(324) = 1944

1944 meters² is your answer

hope this helps
A = 1944 m²
hope this helps

I need help solving this problem 7/10 + 4 =

Answers

7/10=.7
.7+4=4.7
that is the answer
If you need in fractions...
7/10 + 4 = 4 and 7/10
You get this by just adding the whole number to the fraction. Or, do it this way...
7/10 + 4/1 : find LCD to get 10.
=7/10 + 40/10
= 47/10
= 4 and 7/10

PLEASE HELP! Find the distance between each pair of points. Round your answers to the nearest tenth.a. C(-5, -3), D(-4, -2)

b. Y(3.5, 1), Z(-4, 2.5)

Answers

a.
Distance = √((x_2 - x_1)^2+(y_2 - y_1)^2)\n\n = √(\left( -4 - \left( -5 \right) \right)^2 + \left( -2 - \left( -3 \right) \right)^2) \n \n = √( 1 + 1) \n \n = √( 2 )

b. 
Distance = √((x_2 - x_1)^2+(y_2 - y_1)^2)\n\n = \sqrt{\left( -4 - ( 7 )/( 2 ) \right)^2 + \left( ( 5 )/( 2 ) - 1 \right)^2} \n \n= \sqrt{ ( 225 )/( 4 ) + ( 9 )/( 4 )} \n \n= 3 (√( 26 ))/( 2 )

Write a number that is the same when rounded to the nearest hundred and ten

Answers

A number when you round to the nearest hundred and tens is the is is the number 200

The cost for Andrea to produce several units of a certain item is $336 plus $12 per unit. She sells this item for $28 per unit.How many units of the item must she produce and sell so that the amount of money she earns in sales equals the amount of money she spends in production costs? How much money would that be?

Answers

Profit will be achieved when the money earned is greater than the money spent so,
336 + (n*12) = n*28  any subsequent units sold would result in profit
336 = 28n - 12n
336 = 16n
=>  n = 336/16 = 21
21 units must be sold to draw even any more would result in profit
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