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Veseljchak [2.6K]
3 years ago
7

Which expression is not equivalent to 3 times a times r

Mathematics
2 answers:
Paladinen [302]3 years ago
5 0

The last one

Step-by-step explanation:

The last one is dividing.

goldfiish [28.3K]3 years ago
4 0
Answer:
Last one
Exp
3SR has the same variables in the same spot
The last one has the variables mixed up and if the variables are not in the proper order it’s incorrect
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Write an equation in slope intercept form that has a slope of -8 and a y-intercept of 12
vitfil [10]

Answer: -8x + 12

Step-by-step explanation:

12 will be y-intercept because it crosses the y-axis.

-8 will be slope because it is the rate of change.

4 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
Brad a paper airplane out of 2 parallelograms. The height of each parallelogram is 2 inches and the length is 6 inches. What is
Yuki888 [10]

Answer:

16 inch

Step-by-step explanation:

8 0
3 years ago
A store sells avocado for $2.80 per pound. What is the cost of a 2 1 pounds of avocado? <br> 4
omeli [17]
$58.80 you need to multiply 2.80 x 21 to get your answer
7 0
3 years ago
If f(x) = 2x + 3, what is f(–1)?
Helen [10]

Answer:

Normally, sequences don't go behind 1, but let's see for this one.

f(-1) = 1

Step-by-step explanation:

Let's sub for -1 in x.

f(-1) = 2(-1) + 3.

f(-1) = -2 + 3

f(-1) = 1

:)

7 0
3 years ago
Read 2 more answers
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