MATHEMATICS MIDDLE SCHOOL

For the function f(x)=x2-4, fins the value of f(x) when x=6

Answers

Answer 1

Answer:

$f(x)=x^2-4\nf(6)=6^2-4\nf(6)=32$

$f(x)=x*2-4\nf(6)=6*2-4\nf(6)=8$

P.S. Hello from Russia

Answer 2

Answer:

Answer:

Step-by-step explanation:

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Selina earns 8% commission on sales. On one sale,her commission was $20.40. What was the amount of that sale?

Answers

a×0.08=20.40
So $255 was the amount of the sale.

What is 14+56 times 99 /144

Answers

Well 14 + 56 = 70 and 70 x 99/144 = 48 1/8 so your answer is 48 1/8
Hope this helps:)

14 + 56 = 70

70 x 99/100 = 69.3

So the law of order and the law of grouping apply to division

Answers

It depends on what you are grouping

Using the numbers 8, 6, 4, and 2 write an expression that equals 7.

Answers

Using all numbers:

1. (84:2):6=7; {here 84:2=42, 42:6=7}

2. 8-(6-4):2=7; {here 6-4=2, 2:2=1, 8-1=7}

3. (8:2):4+6=7; {here 8:2=4, 4:4=1, 1+6=7}

4. (8:4):2+6; {here 8:4=2, 2:2=1, 1+6=7}

Using not all numbers:

1. (8+6):2=7; {here 8+6=14, 14:2=7}

2. 6:2+4=7; {here 6:2=3, 3+4=7}

3. 42:6=7;

4. 28:4=7.

4:2=20:___
whats the answer

Answers

4 times 5 is 20 and 2 times 5 is ten so it is 20:10

4:2 = 20:

4 * 5 = 20

2 * 5 = 10

the answer is 10. you multiply both numbers by 5. think of it like a fraction

Photo above! How do I find the area of this?

Answers

Area of the figure=area of the square - area of the rectangle 1 - area of the rectangle 2.

Area of the square=side x side=12 * 12 =144
Area of the rectangle 1=8 *5=40
Area of the rectangle 2=5 * (12-8)= 5 * 4=20

Area of the figure=144 - 40 -20=84

Answer : 84

Well, the formula to find the area of something is base times height, so you'll have to multiply the base and height at the bottom, which is 12 times 12 which is 144, and then find the area of the missing/cut-out piece which is 8 times 5 which will be 40, and then subtract the two areas, (144 - 40), which will give you your final area of 104 square inches.
I hope I helped! =D

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