8(2x+2y)-4(3xy-(5x))
Actual way to solve it

Answers

Answer 1

Answer: first distribute the 8 into (2x+2y) then distribute -4 into (3xy-(5x)). Next you do it order of operations which is “PEMDAS” (parentheses, exponents, multiplication, division, addition and subtraction)

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What is the length of a side of a cube with volume 729 cm3

Answers

solution:
v = l x w x h
all cube sides are equal:
v = length^3
given v = 729 cm3
length = cube root (729)
length = 9 cm

Which relations are functions and which are not functions?Column A Column B
1.
{(3, 7), (3, 6), (5, 4),
(4, 7)}
2.
{(1, 5), (3, 5), (4, 6),
(6, 4)}
3.
{(2, 3), (4, 2), (4, 6),
(5, 8)}
4.
{(0, 4), (3, 2), (4, 2),
(6, 5)}

A.
function
B.
not a function

Answers

1)B
2)A
3)B
4)A
1 has a repeated value of 3
2 has no repeated x values
3 has a repeated value of 4
and d has no repeated x values.
Hope this helps! :)

What is the area of the figure below?Explain and show the work that comes with it clearly without the (tex(( & all that stuff

Answers

Area of Rectangle = 8 × 7
= 56cm^2

Length of side of Square = 7-4
= 3cm

Area of Square = 3 × 3
= 9 cm^2
Length of triangle = 8 - 3
= 5cm
Area of triangle = 1/2 × 5 × 3
= 7.5 cm^2

Hope this helps :)

So you multiply 8 and four to give you 32 which is the area of the rectangle, subtract the top measurement of 7 by 4 to give you 3 which will make it simpler to find the area of the square and triangle. To find the area of the square multiply 3 by 3 to get 9. And to find the triangle since we know that 8 minus 3 is 5 and to find the area of a triangle we have to divide by two at the end 5x3 divided by 2 will give you the answer of 7.5. To find the total area do 32+9+7.5
to get 48.5cm squared

Just want you check if my answer is right...i'm not good in math.Ana paid 1/4 of her money for a pair of shoes and 1/5 of it for a shoulder bag. She later spent 3/8 less the remainder of her money for a dress. What part of her money did she pay for the dress?
Answer: 3/8 of 1/4 - 1/5
= 3/8 of 11/20 = 33/160

Answers

x -> her money;
( 1 / 4 )*x = x / 4 for a pair of shoes;
( 1 / 5 )*x = x / 5 for a shoulder bag;
x - x / 4 -x / 5 = 20x / 20x - 5x / 20x - 4x / 20x = 11x / 20 the remainder;
11x / 20 - ( 3 / 8 )*x = 11x / 20 - 3x / 8 = 22x / 40 - 15x / 40 = 7x / 40 for her dress;
She pay 7 / 40 of her money for the dress.

Solve the system by substitution.

y=−3x-2
-7x+3y=10

PLEASE HELP

Answers

y=-3x-2
subsitute -3x-2 for y
-7x+3(-3x-2)=10
distribute
a(b+c)=ab+ac
3(-3x-2)=-9x-6

-7x-9x-6=10
add like terms
-16x-6=10
add 6
-16x=16
multiply -1
16x=-16
divide 16
x=-1

subsitute
y=-3x-2
y=-3(-1)-2
y=3-2
y=1

x=-1
y=1

(x,y)
(-1,1)

If Sandy's cookie recipe calls for 1/3 cup of brown sugar and she increases it by 2/9 of cup, how much brown sugar does she use?