3 years ago

Which expression is equivalent to 30(1/2x-2)+40(3/4y-4)?

Mathematics

2 answers:

barxatty [35]3 years ago

7 0

Answer: The answers (C)

Step-by-step explanation:

nikitadnepr [17]3 years ago

4 0

15x-60+30y-160
= 15x+30y-220

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What is the value of z for the equation fraction 1 over 2z = −fraction 3 over 4 + fraction 1 over 4z? −3 −1 1 3

Liono4ka [1.6K]

1/2 z = -3/4 + 1/4 z
1/2 z - 1/4 z = -3/4
1/4 z = -3/4
z = (-3/4)/(1/4)
z = -3/4 x 4/1
z = -3

6 0

3 years ago

A rectangular doormat is 21 inches long and has an area of 714 square inches.Find its width

saveliy_v [14]

Answer:

34 inches

Step-by-step explanation:

A doormat is the shape of a rectangle and its area uses A=l*w. If the area is 714 and its length is 21, then 714 = 21*w. Solve for w.

714=21w

714/21= 21w/21

34 = w

4 0

4 years ago

I don't understand what the answer is supposed to be, none of my answers match.

jolli1 [7]

The rational expression is the following

$\frac{\frac{x-1}{6xy}}{\frac{5}{2y}}$

By applying the sandwich rule:

we have

$\frac{\frac{x-1}{6xy}}{\frac{5}{2y}}=\frac{(x-1)(2y)}{(6xy)(5)}$

which gives

$\frac{\frac{x-1}{6xy}}{\frac{5}{2y}}=\frac{(x-1)(2y)}{(6xy)(5)}=\frac{(x-1)(2y)}{(2\cdot3xy)(5)}=\frac{(x-1)(2y)}{(3x\cdot2y)(5)}=\frac{x-1}{3x\cdot5}=\frac{x-1}{15x}$

then, the answer is option 2.

7 0

2 years ago

The vertices of a parallelogram are at (4, 1) , (10, 1), (8, -4) , and (2, -4). What is the area of the parallelogram

Margarita [4]

I think the area is 30 units

8 0

4 years ago

On the left, model 4 + (-6). On the right, model 4 - 6.

insens350 [35]

Answer:

On the left because their both positive and the other one is not and also the left one is on the left y axil

5 0

3 years ago