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3 years ago

What is the value of x in the equation 2.5 -0.25 x= -3?

2 answers:

6 0

You start by taking the 2.5 over to the other side. This is a positive number so when you take it over it will become a negative.

2.5-0.25x = -3
     -0.25x =-3-2.5
     -0.25x=-5.5

now -0.25 is being multiplied to x, when you take it over to the other side, it becomes divide.

-0.25x = -5.5
        x = -5.5/-0.25
        x = 22

notsponge [240]3 years ago

3 0

Answer:

D. 22

this is the answer on edge.

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An 8ft length of crown molding costs $12. How much will it cost to buy 40 ft of crown molding?

zzz [600]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

A flagpole is located at the edge of a sheer y = 70-ft cliff at the bank of a river of width x = 40 ft. See the figure below. An

Gnom [1K]

I would solve this using tangents. Let h be height of flagpole.
Set up 2 right triangles, each with a base of 40.
The larger triangle has height of "h+70"
Smaller triangle has height of 70.

Now write the tangent ratios:
$tan A = \frac{h+70}{40} , tan B = \frac{70}{40}$

Note: A-B = 9
To solve for h we need to use the "Difference Angle" formula for Tangent
$tan (A-B) = \frac{tanA - tanB}{1+tan A tan B}$
Plug in what we know:
$tan(9) = \frac{ \frac{h+70}{40} - \frac{70}{40}}{1+ (\frac{h+70}{40})(\frac{7}{4})}$
$tan (9) = \frac{ \frac{h}{40}}{ \frac{7h +650}{160}} = \frac{4h}{7h+650}$
$h = \frac{650 tan(9)}{4-7 tan(9)}$
$h = 35.6$

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3 years ago

Which logarithmic equation is equivalent to the exponential equation 5c=250

Elis [28]

Answer:

c = $log_{5}$ 250

Step-by-step explanation:

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3 years ago

Convert. 5 days = lao hours

Andreas93 [3]

Answer:

120 Hours

Step-by-step explanation:

24 hours in a day

5 days

24 x 5 = 120

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3 years ago

Solve for x. 10x2 – 29x – 21 = 0

Nitella [24]

There are two plausible answers
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4 years ago