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Sloan [31]
3 years ago
9

(6x-4) (3x+4)º find the value of x.

Mathematics
2 answers:
kati45 [8]3 years ago
3 0

Answer:

x = 20

Step-by-step explanation:

The angles form a straight line so they add to 180 degrees

6x-4 + 3x+4 = 180

Combine like terms

9x=180

Divide by 9

9x/9 = 180/9

x= 20

KIM [24]3 years ago
3 0

20

Hope this helps! :)

______________

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If the gradient of the line joining the points [4,-9]and [-3,h]is -3, find the value of H
Scrat [10]

Answer:

<h2>h = 12</h2>

Step-by-step explanation:

To find the value of h use the formula for finding the slope of a line

That's

m =  \frac{y2 - y1}{x2 - x1}

Where ( x1, y1) and (x2 ,y2) are the points

From the question

slope = - 3

The points are [4,-9] and [-3,h]

Substitute these values into the equation

We have

- 3 =  \frac{h + 9}{ - 3 - 4}

- 3 =  \frac{h + 9}{ - 7}

Cross multiply

That's

- 3(-7) = h + 9

21 = h + 9

h = 21 - 9

We have the final answer as

<h3>h = 12</h3>

Hope this helps you

3 0
4 years ago
Maureen went on a 3 day, 50 mile biking trip. The first day she biked 6 miles. The second day she
abruzzese [7]

Step-by-step explanation:

Given

d1 = 6 miles

d2 = 19 miles

d3 = ?

d1+d2+d3 = 50

6+19+d3 = 50

25+d3 = 50

d3 = 50 - 25

= 25miles

7 0
3 years ago
What is the solution to the equation below ?
irina [24]

7/8(x-1/2)= -49/80

Multiply the bracket by 7/8

7/8x-7/16= -49/80

Move -7/16 to other side. Sign changes from -7/16 to +7/16

7/8x-7/16+7/16= -49/80+7/16

7/8x= -49/80+7/16

Find common denominator for 7/16 which is 5. Multiply 5 for the numerator and denominator.

7(5) / 16 (5)

= 35/80

7/8x= -49/80+35/80

7/8x= -14/80

Reduce -14/80 , divide by 2

(-14) /2=7 , 80/2= 40

-14/80= -7/40

7/8x= -7/40

Multiply by 8/7

7/8x*8/7= -7/40 * 8/7

Cross out 7 and 7 , and divide by 7. Cross out -7 and 7 and divide by 7. Cross out 40 and 8 divide by 8.

x= -1/5

Answer: x= -1/5 - G.

3 0
3 years ago
The faces of triangular pyramid have a base of 5cm and a height of 11cm what is the lateral area of the pyramid
prisoha [69]

Answer:

55cm

Step-by-step explanation:

11 x 5 = 55, so the area of the pyrmid is 55cm.

4 0
3 years ago
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On Monday, 21 DVD's were checked out at the library. This is 3 less than half the amount of books checked out that day. How many
lbvjy [14]
DVDs=½b-3
21=½b-3
B=(21+3)÷½
=24*2
=48books
4 0
3 years ago
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