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barxatty [35]
2 years ago
8

What is x+3= - (-x+ ___ )​

Mathematics
1 answer:
Natali [406]2 years ago
6 0

Answer:

-3

Step-by-step explanation:

Note the right side of the equation. There is a negative sign outside of the parenthesis. Distribute the negative sign to all terms within the parenthesis:

x + 3 = - (-x + __)

x + 3 = x - ___

Note:

1) When multiplying a negative and positive together, the answer will be negative

2) When multiplying a negative and negative together, the answer will be positive:

x + 3 = x - ___

Note the equal sign, this means that the two side of the equation must equal. This means that the only answer choice is -3:

x + 3 = x - (-3)

x + 3 = x + 3 (True)

~

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julia-pushkina [17]

Answer:

49/16

Step-by-step explanation:

make the fraction into a mixed number then multiply have answer

3 0
3 years ago
A and B are independent events. P(S) = 0.40 and P(B) = 0.30. What is P(A and B)
n200080 [17]

The value of the probability P(A and B) is 0.12

<h3>How to determine the probability?</h3>

The given parameters are

P(A) = 0.40

P(B) = 0.30

Given that the events are independent events;, we have:

P(A and B) = P(A) * P(B)

So, we have:

P(A and B) = 0.40 * 0.30

Evaluate

P(A and B) = 0.12

Hence, the value of the probability P(A and B) is 0.12

Read more about probability at

brainly.com/question/11234923

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3 0
2 years ago
In triangle ABC, angle a and b are complementary, where the cos A= 0.5. What is the angle measure of B in degrees?
aleksley [76]

Angle B measures 30 degrees.

Step-by-step explanation:

Step 1:

If two angles are complementary, the sum of the two angles will equal 90°.

So if angles A and B are complementary, the sum of the angles A and B will equal 90°.

It is given that cos A = 0.5, we can determine the value of A by taking the cos inverse of the value 0.5.

Step 2:

If cos A = 0.5, A = cos^{-1} (0.5) = 60^\circ. So angle A is 60°.

As A and B are complementary, angle A + angle B = 90°.

So 60° + angle B = 90°, angle B = 90° - 60° = 30°.

So angle B measures 30° while angle A measures 60°.

8 0
3 years ago
Read 2 more answers
From the top of a 210 foot lighthouse located at sea level, the keeper spots a boat at an angle of depression of 23 degrees
denpristay [2]
The distance from the lighthouse to the boat will be given by:
tan θ=opposite/adjacent
θ=angle of depression=23
opposite= height of the lighthouse
adjacent=distance from the boat to the bottom of the light house
hence
tan 23=210/a
thus solving for a we obtain:
a=210/tan23
hence
a=494.73 ft
6 0
3 years ago
Solve for the roots in simplest form using the quadratic formula:<br>4x2 – 12x = -5​
Art [367]

Answer:

x=2.5&.5

Step-by-step explanation:

The quadratic formula is (-b+or-sqrt(b^2-4ac)/2a

12+or-sqrt((-12^2)-4(4)(5))

12+or-sqrt(144-80)

12+or-sqrt(64)

(12+8)/8 and (12-8)/8

x=2.5 and x=.5

7 0
3 years ago
Read 2 more answers
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