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2 years ago

3 times the sum of a number w and 5

Mathematics

1 answer:

DedPeter [7]2 years ago

3 0

Answer: 3× (w +5)

Step-by-step explanation:

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Helppp me please IREADY

Morgarella [4.7K]

Hello there! The answer is the first option, 31/55.

To solve this, we don't even need to do any math. Note that fractions with the same numerator and denominator will be equal to 1.

Knowing this and looking at our second and fourth options, 55/55 x 111 and 31/31 x 111, these problems are the same as 1 x 111, which results in 111, which is not less than, leaving us with the third and first options.

The third option is 55/31, meaning we have more than a whole, so we are multiplying by a number greater than 1, making our answer over 111 and this option not correct.

This leaves the first option as your answer!

7 0

3 years ago

One operator is holding a laser pointer at a height of 9 feet whose beam is reflected on a horizontal reflecting surface at a po

lutik1710 [3]

Answer:

The height (in feet) at which the laser will impact the wall is 6.75 feet

Step-by-step explanation:

The given parameters are;

The height from which the laser beam operator is holding the laser = 9 feet

The horizontal distance away from the pointer the beam is reflected = 8 feet

Given that we have;

$f(x) = \dfrac{9}{8} \times \left | x - 8\right | = y$

When x = 8, the point of reflection, the height, f(x) is given as follows;

$f(x) = \dfrac{9}{8} \times \left | 8 - 8\right | = 0$

When x = 7, the point of reflection, the height, f(x) is given as follows;

$f(x) = \dfrac{9}{8} \times \left | 7 - 8\right | = \dfrac{9}{8}$

Therefore, given that the point of reflection is at an elevation of 0 relative to the 9 feet of the laser source (pointer), by tan rule, we have;

$tan(\theta) = \dfrac{Opposite \ side}{Adjacent \ side} =\dfrac{9}{8} = \dfrac{h}{7}$

Where;

h = The height at which the laser meets the wall

$h = \dfrac{9 \times 7}{8} =7.875$

Given that the wall the laser meets is at the point x with elevation 9/8, the height, y, at which the laser meets the wall is therefore;

$y = \dfrac{9 \times 7}{8} - \dfrac{9}{8} = \dfrac{54}{8} = 6.75 \ feet$

The height (in feet) at which the laser will impact the wall = 6.75 feet.

7 0

3 years ago

Which situation would be represented by zero?

Dominik [7]

Answer:

I had 18 cookies and I ate them all.

Step-by-step explanation:

This situation is represented by zero because 18-18 is 0.

8 0

3 years ago

Read 2 more answers

Can you please help me with this?

Nikitich [7]

Answer:

Step-by-step explanation:

I beilieve its B? Ive never heard about dances for inuguration.

3 0

3 years ago

Are these rates proportional?

Scilla [17]

Answer:

no is correct

Step-by-step explanation:

it is proportional until 8 ounces.

the first one is $0.75
you add another $0.75 and that equals $1.50
then you would add $1.50 and $1.50 then it equals $3.00 and it should be $2.50 so therefore it is not proportional

6 0

2 years ago