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3 years ago

Give first the step you will use to seperate variable and then solve the equation:a)z/3=5/4

1 answer:

8 0

Option #1 (and the fastest):
Multiply both sides by 3 to cancel the “divided by 3” on the left side where z is.
z/3 • 3 = 5/4 •3

z = 15/4

Option #2: Cross multiply and then solve for z:
z/3 = 5/4 -> 4z=15

Then divide by 4.
4z/4 = 15/4

z = 15/4

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After a storm damages the community center, Shanika and her friends hold fundraising events to help pay for repairs. After the f

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2 years ago

A boat is heading towards a lighthouse, whose beacon-light is 139 feet above the

Novay_Z [31]

The horizontal distance between light house and boat is 1588.78 feet approximately.

The figure is given by,

Here, AB = height of the lighthouse bacon light above the water = 139 feet

Now angle ACB = 5 degree

Let the horizontal distance of light house from the boat = BC = x feet

So by trigonometric function we get,

tan 5 = AB/BC

tan 5 = 139/x

x = 139/tan 5 = 1588.78 (approximately)

Hence the horizontal distance between light house and boat is 1588.78 feet approximately.

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1 year ago

lynn takes her puppy, olive, to a doggie daycare. The price for the daycare is 21 per day along with a monthly admission fee of

sashaice [31]

D=426-48(21)
I got 18 days.
So, D=18
Hope this helps! :)

3 0

3 years ago

Read 2 more answers

If DF = 9x-39, find EF.

otez555 [7]

$DF=DE+EF\\\\DF=9x-39\\DE=47\\EF=3x+10\\\\\text{substitute}\\\\9x-39=47+3x+10\\9x-39=3x+57\ \ \ |-3x\\6x-39=57\ \ \ \ |+39\\6x=96\ \ \ \ |:6\\x=16\\\\\text{put the value of x to the expression}\ 3x+10\\\\EF=3(16)+10=48+10=58$

Answer: EF = 58

7 0

3 years ago

Which of the following is the solution for 7 - 4x ≥ 35 ?

melamori03 [73]

There are no solutuons listed (says which of the following). My answer below should be in the list to choose from.

7 - 4x ≥ 35
subtract 7 from both sides

-4x ≥ 28
divide both sides by -4 AND change the direction of the inequality sign because we're dividing by a negative

x ≤ -7

CHECK:
7 - 4x ≥ 35
7 - 4(-7) ≥ 35
7 + 28 ≥ 35
35 ≥ 35

ANSWER: x ≤ -7

Hope this helps! :)

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3 years ago

Give first the step you will use to seperate variable and then solve the equation:a)z/3=5/4​

Give first the step you will use to seperate variable and then solve the equation:a)z/3=5/4