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ad-work [718]
3 years ago
8

Hi! I'm really bad at math, I was wondering if anyone could help me slove these problems and explain how you got the answer? May

be put it in the simplest way to say it, I can get confused easily, Thank You <3
Find the value of the expression
12²

Evaluate
( 8/9²

Simplify the expression
(3²-2³) ÷2

Evaluate the following for x=5 and y=3
Y³ - 4x

Evaluate the expression for x=2 and y=5
3y-5
X
Mathematics
2 answers:
Nostrana [21]3 years ago
8 0
1) 12^2 = 144
2)
3) 0.5. That’s a guess
4) 7
5) 10

They are what I would put but they might not be correct. I’m sorry but I’m unsure on question 2
Ksenya-84 [330]3 years ago
3 0

{12}^{2}  = 144
is the answer
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Estimate the area of the square
Alla [95]

Answer:

100 ft squared

Step-by-step explanation: you would usually round up to the nearest whole number with these and 9.7 would round to 10 and 10 times 10 would be 100

6 0
3 years ago
You have 42 ft. of fencing (1 ft. segments) to make a rectangular garden. How much should each side be to maximize your total ar
Verizon [17]

Answer:

Length=10.5\ ft

Width=10.5\ ft

Area=110.25\ ft^{2}

Step-by-step explanation:

Let

x----> the length of the rectangular garden

y---> the width of the rectangular garden

we know that

The perimeter of the rectangle is equal to

P=2(x+y)

we have

P=42\ ft

so

42=2(x+y)

simplify

21=(x+y)

y=21-x------> equation A

Remember that the area of rectangle is equal to

A=xy ----> equation B

substitute equation A in equation B

A=x(21-x)

A=21x-x^{2}----> this is a vertical parabola open downward

The vertex is a maximum

The y-coordinate of the vertex is the maximum area

The x-coordinate of the vertex is the length side of the rectangle that maximize the area

using a graphing tool

The vertex is the point (10.5,110.25)

see the attached figure

so

x=10.5\ ft

Find the value of y

y=21-10.5=10.5\ ft

The garden is a square

the area is equal to

A=(10.5)(10.5)=110.25\ ft^{2} ----> is equal to the y-coordinate of the vertex is correct

6 0
3 years ago
There are 257 people at a dance performance. Orchestra seats cost $12 and balcony seats cost $8. The total receipts were $2,716.
solniwko [45]

x = # of balcony seats

y = # of orchestra seats

We have to create a system of equations to solve this problem

x + y = 256

$8x + $12y = $2,716

We will solve this system of equations by elimination.

Multiply the first equation by -8

-8x - 8y = -2048

8x + 12y = 2716

Let's add the equations together

0 + 4y = 668

Simplify the left side

4y = 668

Divide both sides by 4

y = 167

We can subtract 167 from 257 to get the number of balcony seats.

257 - 167 = 90 balcony seats

There are 167 orchestra seats and 90 balcony seats

5 0
3 years ago
△ABC has a&gt;b&gt;c. If one of the angles in the triangle is 60°, name the angle that can be equal to 90°.
Aleksandr-060686 [28]

Answer:

Angle A

Step-by-step explanation:

a is greater than b, which is greater than c

a triangle has 180 degrees

so 180-90 is 90

90-60 is 30

a>b>c

90>60>30

this would be a right triangle since one of the angles is 90 degrees

4 0
3 years ago
Read 2 more answers
SOMEONE PLEASE HELP!!!!!!!!<br> (Also please don't reply if you don't know)
svet-max [94.6K]

Answer: a coefficet is a number that has letters by it but you only put the number so anyone that a letter and a number youll put that one in the list

Step-by-step explanation:

7 0
3 years ago
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