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3 years ago

13

Solve equation X/4-7=-3

1 answer:

Anettt [7]3 years ago

7 0

This could mean two things from how you’ve written it.

It could mean there is an X with the denominator 4 or it could mean there’s an X with the denominator 4-7.

I am going to work with the first one and assume the 7 is separate. Apologies if that is incorrect.

First, I would add the 7 to both sides.

This leaves you with X/4 = 4

Then, multiply both sides by 4, to get X on its own.

This leaves X=16, which is the answer.

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PLS HELP ME!!!!!!!! 99 POINTS

Amiraneli [1.4K]

Answer:

$\angle LKN=\arctan1.8\sqrt{97}\approx 86.77^{\circ}$

Step-by-step explanation:

Draw the second altitude MB (see attached diagram).

Quadrilateral HLMB is a rectangle, then LM = HB = 3 units.

Trapezoid KLMN is isosceles trapezoid (because KL=MN), thus

$KH = BN = \dfrac{KN-HB}{2}=\dfrac{13-3}{2}=5\ units\\ \\HN=HB+BN=3+5=8\ units$

Triangle LHN is right triangle, then by Pythagorean theorem,

$LN^2=LH^2+HN^2\\ \\89^2=LH^2+8^2\\ \\LH^2=89^2-8^2\\ \\LH^2=(89-8)(89+8)\\ \\LH^2=81\cdot 97\\ \\LH=9\sqrt{97}\ units$

Consider right triangle KLH. In this triangle,

$\tan\angle LKH=\{\tan\angle LKH\}=\dfrac{\text{opposite leg}}{\text{adjacent leg}}=\dfrac{LH}{KH}=\dfrac{9\sqrt{97}}{5}=1.8\sqrt{97}\ units$

So,

$\angle LKN=\arctan1.8\sqrt{97}\approx 86.77^{\circ}$

5 0

3 years ago

What is the solution set of x/4 is less than 9/x?

balandron [24]

Answer:

D

Step-by-step explanation:

$\frac{x}{4}\leq \frac{9}{x} \\x\leq \frac{36}{x} \\let x0\\so~0< x\leq 6$

combininig the two cases

x≤-6 and 0<x≤6

7 0

3 years ago

921 divided by 2 what’d the remainder

s2008m [1.1K]

921÷ 2 = 460.5
which means the remainder is 1
So; the answer is 1

8 0

4 years ago

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Lyra and Donna are testing the two-way radios they built for their high school science project. Lyra goes to the top of a buildi

Strike441 [17]

The range of communication is about 55 meters.

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3 years ago

2x+4y=12 x+y=2 What is the substitution method for this system of equations

kiruha [24]

Answer:

The solution is x = -2, y = 4.

Step-by-step explanation:

2x + 4y = 12

x + y = 2

From the second equation: y = 2 - x.

Now substitute for y in the first equation:

2x + 4(2 - x) = 12

2x + 8 - 4x = 12

-2x = 4

x = -2.

Now find y by substituting x = -2 in the second equation:

- 2 + y = 2

y = 4.

3 0

4 years ago

Read 2 more answers