Add 8 to both sides to get
4x = 7x +6

Subtract 7x from both sides to get
-3x=6

Divide both sides by -3 to get
X= -2

In algebra equations you can do whatever you want as long as you do it to both sides of the equation

7 0

3 years ago

What is the slope of the line represented by the equation y=x/4-€

sveticcg [70]

Y = x/4 - €

y = (1/4)x - €

y = 0.25x - € comparing to y = mx + c

m = slope = 0.25 or (1/4)

5 0

4 years ago

Factor the polynomial completely x^2-x-20

Strike441 [17]

Answer:

(x − 5) (x + 4)

Step-by-step explanation:

x² − x − 20

Factor using AC method:

1 × -20 = -20

Factors of -20 that add up to -1: -5 and 4

Divide by 1 and reduce: -5/1 and 4/1

(x − 5) (x + 4)

5 0

4 years ago

Read 2 more answers

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

Answer:

Option D

The height of tree is 20 feet tall

Solution:

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