-2(1/2x-1)=4

Question Help

mina [271]

The answer is 44 and if he deposits it is 33 dollars:

11x4

1x4=4

So 11x4=44

And if he deposits 11 he will have 33

3 0

3 years ago

Lara has $1,425 in her bank account. Write and solve an equation to show how much money she started with if that amount reflects

bixtya [17]

1,425 = 114%
so
1,425 = 114% • x

1,425 × 100 ÷ 114 = x
x = 1250

hope this helps!

8 0

3 years ago

a coin is flipped and a six-sided die, numbered 1 to 6, is rolled. find the probability of flipping tails and rolling a number l

pantera1 [17]

Answer:

5/6

Step-by-step explanation:

There is a 1 out of 2 chance that you will roll tails, so the probability is 1/2.

A number less than three is a 2 and 1, so the probability is 2/6.

Add 1/2 + 2/6. (Change 1/2 to 3/6 so you can add.)

3/6 + 2/6 = 5/6

<em>I hope this is correct and helps you! </em>

6 0

3 years ago

If the distance from the boat to the lighthouse is 120 meters and the angle of elevation is 40°, which of the following equation

Sidana [21]

You can use the fact that lighthouses are usually standing perpendicular to the ground that smaller distance on earth surface(planes or water bodies like sea or ocean or calm river) acts as if they a straight plane.

The length (y) of the lighthouse is given by:

Option D: tan 40° = y over 120.

<h3>What is angle of elevation?</h3>

What you see something higher than your eye level height, you need to see up, you elevate your head to see that thing. The angle from the straight horizontal level of eye to the current elevated level is measured and named as angle of elevation.

Similarly, there is angle of depression when the observer looks down.

<h3>How to calculate the height of the considered lighthouse?</h3>

See the figure attached below to understand the symbols used in calculations.

Let the boat is on point C, and let the light house be AB.

Then we have:

Length of CA = 120 meters

∠ ACB = 40°

To find: length of AB

By using the trigonometric ratio tangent, we get:

$tan(\angle ACB) = \dfrac{AB}{AC}\\\\tan(40^\circ) = \dfrac{h}{120}$

Since here h is denoted by y, we have h = y, or

The equation to find the height of the lighthouse is

$tan(40^\circ) = \dfrac{y}{120}$

Thus,

The length (y) of the lighthouse is given by:

Option D: tan 40° = y over 120.

Learn more about angle of elevation here:

brainly.com/question/12483071

8 0

2 years ago

Slove the system of the linear equations by either sus substitution or elimination 8x-12y=20 4x-4y=-4

marissa [1.9K]

Answer:

x = -8 and y = -7

Step-by-step explanation:

I will solve your system by substitution.

(You can also solve this system by elimination.)

8x−12y=20;4x−4y=−4

Step: Solve8x−12y=20for x:

8x−12y+12y=20+12y(Add 12y to both sides)

8x=12y+20

8x

8

=

12y+20

8

(Divide both sides by 8)

x=

3

2

y+

5

2

Step: Substitute

3

2

y+

5

2

forxin4x−4y=−4:

4x−4y=−4

4(

3

2

y+

5

2

)−4y=−4

2y+10=−4(Simplify both sides of the equation)

2y+10+−10=−4+−10(Add -10 to both sides)

2y=−14

2y

2

=

−14

2

(Divide both sides by 2)

y=−7

Step: Substitute−7foryinx=

3

2

y+

5

2

:

x=

3

2

y+

5

2

x=

3

2

(−7)+

5

2

x=−8(Simplify both sides of the equation)

8 0

3 years ago

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