MATHEMATICS HIGH SCHOOL

Which equation matches the sentence?Column A Column B
1.
Three less than 9 times a number is 21.
2.
The sum of 3 times a number and 9 is 21.
3.
The difference of 9 times a number and 3 is 21.
4.
Nine less than 3 times a number is 21.
A.
3n + 9 = 21
B.
9n – 3 = 21
C.
3n – 9 = 21

Answers

Answer 1
Answer: Hello,

1: 9n-3=21 ==>B

2: 3n+9=21 ==>A

3: 9n-3=21 ==>B

4: 3n-9=21 ==>C

I wish to have understood all those sentences.

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Please help simplify with steps

Answers

Remember that you can always multiply or divide BOTH the numerator and denominator
of the fraction by anything you want to.  You just have to do exactly the same to both of
them.

The way to simplify a fraction is to divide both the numerator and denominator by their
greatest common factor.

Do you see all of those 'x's on the top and bottom ?  The top and bottom can
both be divided by x-cubed.

Numerator:
Divide (-4³) by x³, and you have (-4) left.

Denominator:
Divide (x³ - 2x⁴) by x³, and you have (1 - 2x) left.

So, the simplified fraction is [  -4 / (1 - 2x)  ].

That's a perfectly good answer, but you could make it look a little prettier
if you multiply the top and bottom both by -1 .  Then it would be

                             4 / (2x - 1) .

Either one is fine.

Can she buy enough packs ?

Answers

How many tiles does she need ?

1 square meter = 10,000 cm²
12 square meters = 120,000 cm²
Each tile = (20 cm x 20 cm) = 400 cm²
Tiles needed = 120,000 / 400 = 300 tiles

How many tiles can she buy ?

1,000 / 34.99 = 28 boxes, with 20.28 left over . . . not enough for another box.
28 boxes of 10 tiles per box = 280 tiles

Halima doesn't have enough money to buy enough tiles
to cover the wall.  She can only buy 280 tiles, but it would
take 300 to cover the wall.

She can cover 280/300 = 93 and 1/3 percent of the wall,
leaving 6 and 2/3 percent with the old ugly plaster showing.
Maybe she could leave the bare part down at the bottom, and
then hide it with a table up against the wall.
 

im pretty sure she can only cover 380 of it

What is the intersection of plane TUYX and plane VUYZ? (Image below. Multiple Choice)

Answers

Answer:

B) UY

Step-by-step explanation:

From the given figure, TUYX is one of the side of the rectangular prism and UVYZ  is another side of the rectangular prism.

The both sides are intersecting perpendicular in one edge, that is the line segment UY.

You can see it on the figure.

Therefore, the intersecting line is UY.

Answer: B) UY

Step-by-step explanation:

Andrew’s rotation maps point M(9, –1) to M’(–9, 1). Which describes the rotation?

Answers

180 rotation  i took the test all the other ones were wrong                                                                                                                

Answer:

180

Step-by-step explanation:

What is 12 percent of 120?

Answers

12% of 120 is 14.4

Change the percentage into a decimal by dividing over 100:

12 / 100 = 0.12

Multiply:

0.12 × 120 = 14.4

Answer:

12\% \: of \: 120 \n (12)/(100) * 120 \n (1440)/(100) \n \boxed{14.4}

A stick measures 2 3/10 meters long write both of the decimal and percent equivalent to the length of the stick

Answers

Answer:

decimal is 2.3 and percent is 230%

hope this helps
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A right triangle has a hypotenuse of length 59 and one leg of length 23. Part A: Determjne the angle measure of the other two acute angles in the triangle. Round to the nearest hundredth. Part B: Determine the side length of the other leg.
Slope: 12Y-Intercept: -5Equation: ______________