MATHEMATICS MIDDLE SCHOOL

Help with these questions??

Answers

Answer 1

Answer:

x/2 + x + x/3 = 8

Simplify both sides of the equation

x/2 + x +x/3 = 8

Simplify

11/6 x = 8

Multiply both sides by 6/11

(6/11)*(11/6 x ) = (6/11)*(8)

x = 48 / 11

decimal will be x = 4.36

-7(x-1)-3(x-4)

Distribute
(-7)(x)+(-7)(-1)+(-3)(x)+(-3)(-4)

= -7x+7+ -3x +12

Combine like terms

-7x+7+ -3x+12

= (-7x+ -3x ) + ( 7+12)

= -10x + 19

3(x-2)^2 -5(x-2)+3

Distribute

= 3x^2 + -12x+12+(-5)(x)+(-5)(-2)+3

= 3x^2 +-12x+12+ -5x +10 +3

Combine like terms

3x^2 + -12x+12+ - 5x+10 +3

(3x^2) + (-12x+ -5x ) + (12+10+3)

= 3x^2 + -17x + 25

= 3x^2 -17x+25

I hope that's help ! Please if you have question about all 3 just let me know .

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the area of the base of a square notepad is 2.25 square inches. what is the length of one side of the base of the notepad

Answers

The area of a square is the length of one side squared, so to find the length of a side, find the square root of the area. The square root of this notepad's area (2.25) is 1.5 inches, so that is the length of one side of the notepad.

Can someone please help me with #10. i need the one with solution. thanks!

Answers

Problem 10
One foot is equal to 0.333 yards, so convert the feet to yards.
One inch is equal to 0.0278 yards.
(36 feet × 0.333 = 12) 36 feet = 12 yards
(24 feet × 0.333 = 8) 24 feet = 8 yards
(9 inches × 0.0278 = 0.25) 9 inches = 0.25 yards
Now, multiply it all together (L × W × H).
12 × 8 × 0.25 = 24 yards
Then multiply the number of cubic yards.
24 × 55= $1320
The answer is $1320

The reason this problem is so sneaky is that it has a lot of
different units in it, and you have to keep them all straight.

Volume of concrete for the patio = (length) x (width) x (height).

You know all of these dimensions, but be careful. Before
you multiply them, they must all be in the same units.

Length = 36 ft
Width = 24 ft
Height = 9 inches = 3/4 of a ft (0.75 ft).

NOW you can multiply to get the volume.

Volume = (36 ft) x (24 ft) x (0.75 ft) .

The result is the volume in ft³ (cubic feet).

Now you need to figure out how much this will cost, but you run into
another problem . . . you know how much each yd³ costs, but you
only have the volume in ft³. You have to change the ft³ into yd³ .

Here's the tool you need to do that: 1 yd³ = 27 ft³

The rest is just arithmetic. I know you can handle it from this point.

A circular plate has a radius of 13 cm.What is the area of the plate?

Use 3.14 for π .

Enter your answer as a decimal in the box.

Answers

a=pir^2
a=pi13^2
a=169pi
a=530.66 square cm

Answer: 530.66 is the answer

Hope u get a good grade

Express 8.21 as a mixed number.

Answers

I think that it is 8 21/100

$8 (21)/(100)$ will be the mixed number for the decimal value 8.21

What are two equivalent fractions for 2/10, three equivalents fractions for 3/11 and three equivalent fractions for 1/12?

Answers

Well, $(2)/(10)=(1)/(5)=(3)/(15)=(4)/(20)=(5)/(25)=(n)/(5n)$ for every n integer.
$(3)/(11)=(6)/(22)=(9)/(33)=(12)/(44)=(15)/(55)=(3n)/(11n)$ for every n integer.
$(1)/(12)=(2)/(24)=(3)/(36)=(4)/(48)=(5)/(60)=(n)/(12n)$ for every n integer.

2/10 is equal to 1/5 cause u divide by 2 and 4/20 cause u divide by 2.for 3/11 r 6/22 cause multiply by 2 and 9/33 cause u multiply by3 finally 1/12 r 2/24 cause u multiply by 2 and 3/36 cause u multiply by 3

What percent is 54 of 60

Answers

54-60 is 90 percent because 54÷60= 0.9=90

90% would be your answer.