MATHEMATICS MIDDLE SCHOOL

What is the answer to 3x{5x[10+5(500-100)+399]}

Answers

Answer 1

Answer:

Answer:

3x{5x[10+5+400+399]}

3x{5x814}

3x4070

=1221

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Solve for r:

-5 = 7 + 3r

Answers

So,

-5 = 7 + 3r
(subtract 7 from both sides)
-12 = 3r
(divide both sides by 3)
-4 = r

$-5=7+3r\ \ \ \ \ \ |combine\ like\ terms\n\n-5-7=3r\n\n-12=3r\ \ \ \ \ \ \ |:3\n\nr=-4$

2A bag contains only red and blue marbles. Yasmine takes one marble at random from the bag. The probability that she takes a red marble is 1 in 5. Yasmine returns the marble to the bag and adds ﬁve more red marbles to the bag. The probability that she takes one red marble at random is now 1 in 3. How many red marbles were originally in the bag?
10 red
3 red
5 red
2 red

Answers

Originally, there were
x = 5 red
4x = 20 blue

Now, there are
x+5 = 10 red
4x = 20 blue

5/8 divide by 1/4 simplest form

Answers

(5/8):(1/4)= 5/8 • 4= 20/8=5/2 = 2 and 1/2

5/8/1/4
=5/8*4/1
=5/2
20 charrr

Draw 2 lines in a triangle. Make 2 triangles and 2 trapezoids.

Answers

here just draw a line from from the top of the triangle to the base middle point and another from right side to left. then you will see two triangles on upperside and 2 trapizoids on lowerside.

A woman put $580 into a saving account for one year . the rate of interest on the account was 6 half %. how much was the interest for the year in dollars and cents?

Answers

I don't know about American currency but, I think it is $617 and 70 cents like $617.70.

6.5% = 6.5/100 = 0.065
0.065 x 580 = 37.7
$580 + $37.70 = $617.70

A delivery truck travels 278 miles each day.How far does it go in 25 days

Answers

6,950 miles in 25 days

Answer:

6950

Step-by-step explanation: multiply 278 times 25

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Solve for x. 12x/5 = 18 A x = 43 1/5 B x = 7 1/2 C x = -7 1/2