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alina1380 [7]
3 years ago
14

5(x + 20) = 7x + 30

Mathematics
2 answers:
Ostrovityanka [42]3 years ago
5 0
Start by multiplying out the 5
5x + 100 = 7x + 30

Subtract 5x from both sides
100 = 2x +30

Subtract 30 from both sides
70 = 2x

Divide by 2
x=35
Leto [7]3 years ago
3 0

x = 35

step by step in picture:

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Dado un triángulo rectángulo cuyo perímetro es de 48 cm, la diferencia entre su lado mayor y su lado menor es de 8 cm y su área
lesya692 [45]

Answer:

5471002836nmcncm.....

5 0
3 years ago
Determine whether this pair of lines is parellel, perpendicular, or neither 6+2x=3y 3x+2y=9 Choose the correct answer below. A.
andriy [413]

Answer:

Option A. These two lines are perpendicular

Step-by-step explanation:

we know that

If two lines are parallel, then their slopes are equal

If two lines are perpendicular, then their slopes are opposite reciprocal (the product of their slopes is equal to -1)

step 1

Convert the given equation A in slope intercept form

y=mx+b

where

m is the slope

b is the y-intercept

we have

6+2x=3y ----> equation A

Solve for y

That means----> isolate the variable y

Divide by 3 both sides

y=\frac{2}{3}x+2

so

m_A=\frac{2}{3}

step 2

Convert the given equation B in slope intercept form

y=mx+b

where

m is the slope

b is the y-intercept

we have

3x+2y=9 ----> equation B

Solve for y

That means----> isolate the variable y

subtract 3x both sides

2y=-3x+9

Divide by 2 both sides

y=-\frac{3}{2}x+4.6

so

m_B=-\frac{3}{2}

step 3

Compare the slopes

m_A=\frac{2}{3}

m_B=-\frac{3}{2}

The slopes are opposite reciprocal (the product is equal to -1)

therefore

These two lines are perpendicular

3 0
4 years ago
Find x if the base angles of an isosceles triangle are 61 degrees and 7x+19.
Alla [95]

The question provides the measures of two angles, (one of which contains

a variable), and the relationship between the angles.

The value of <em>x</em> is <u>6 degrees</u>

Reason:

The given parameters are;

The base angles of the isosceles triangles are; 61° and (7·x + 19)°

Required:

To find the value of <em>x</em>

<em />

Solution:

By definition of an isosceles triangle, we have;

The base angles of an isosceles triangle are equal, therefore;

(7·x + 19) = 61

Which gives;

x = \dfrac{61 - 19}{7} = 6

The value of<u> </u><u><em>x</em></u><u> = 6</u>

Learn more here:

brainly.com/question/16350203

6 0
3 years ago
I need to know 6 50/6 converted to fraction and simpilied
FromTheMoon [43]

6\frac{50}{6} =6\frac{25}{3}=14\frac{1}{3}  =\frac{43}{3}

Hope this helped

7 0
3 years ago
i-Ready Percent Change - Quiz - Level G ) A meteorologist forecasted that Monday's high temperature would be 76°F. On Monday, th
grin007 [14]

The percent error is calculated by the formula Absolute Value of (Error - Actual / Actual then times 100).

In this case the Error value was 76, and the Actual was 80.

So, set up the expression

I(76 - 80)/80 x 100I

I-4/80 x 100I

I-400/80I

I-5I

5

The percent error was 5 percent, since that was how much her estimation differed from the actual amount.

<h2><u>5 percent</u></h2>
7 0
3 years ago
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