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aivan3 [116]
3 years ago
13

4x-7=17 solve for x please help thank you

Mathematics
1 answer:
Shtirlitz [24]3 years ago
8 0
4x-7 = 17
4x = 24
x = 6
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A. 12
kondor19780726 [428]

Tree casts a shadow 30 feet long. A MHS student standing near the tree casts a shadow 9 feet long. The  student is 6 feet tall. What is the height of the tree? Show all work

<em><u>Answer:</u></em>

Option D

The height of tree is 20 feet tall

<em><u>Solution:</u></em>

From given question,

Shadow of tree = 30 feet

Height of tree = ?

Height of student = 6 feet

Shadow of student = 9 feet

We have to find the height of tree

We can solve the sum by proportion

\frac{\text{height of tree}}{\text{shadow of tree}} = \frac{\text{height of student}}{\text{shadow of tree}}

This forms a proportion and we can solve the sum by cross multiplying

\frac{\text{height of tree}}{30} = \frac{6}{9}\\\\\text{height of tree} = 30 \times \frac{6}{9} = 30 \times \frac{2}{3}\\\\\text{ height of tree } = 10 \times 2 = 20

Thus height of tree is 20 feet tall

5 0
3 years ago
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Natasha2012 [34]

Answer:

I think it is D but I am not 100% sure

Step-by-step explanation:

7 0
3 years ago
If u = 4 inches, v = 5, w = 7 inches, x = 6 inches, y = 8 inches, and z = 5 inches, what is the area of the object
Vlad [161]

Answer:

A

Step-by-step explanation:

8 0
3 years ago
What is the equation of the line that passes through the point (-7,-4) and has an undefined slope?
slava [35]

Answer:

When the slope is UNDEFINED, that means the denominator of the slope formula is ZERO .

Slope formula = (y2 - y1)/(x2 - x1), and the graph is a VERTICAL line and the equation of the line is x =7 . Point (7, -4) is a point on the line.

Hope this helps...

3 0
3 years ago
Read 2 more answers
The sum of a number and -2 is -9 . what is the number
adell [148]

Answer:

x=-7

Step-by-step explanation:

Translate into an equation.

“A number” + -2 = -9

Assign “a number” to be “x”

X+-2=-9

Add 2 on both sides to even it out and get x

X-2+2=-9+2

X=-7

The number is -7. :)

4 0
2 years ago
Read 2 more answers
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