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lubasha [3.4K]
2 years ago
9

What is the value of X?

Mathematics
1 answer:
Rudik [331]2 years ago
3 0

Answer:

x=12°

Step-by-step explanation:

180 - 90 = 4x - 2° + 3x + 8 °

90°= 7x + 6

90° - 6 = 7x

7x = 84

x= 84/7

x = 12

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I need help first person to answer right gets brainly
Dahasolnce [82]

Answer:

see explanation

Step-by-step explanation:

A cube has 6 congruent square faces

The area of 1 face = \frac{2}{3} × \frac{2}{3} = \frac{4}{9}

Multiply by 6 to obtain surface area of cube

surface area = 6 × \frac{4}{9} = \frac{24}{9} = \frac{8}{3} units²

6 0
3 years ago
An instructor wants to write a test with 25 questions where each question is worth 3, 4, or 5 points based on difficulty. He wan
irakobra [83]

ANSWER

Find out the how many 3, 4, and 5 point questions could there be.

To proof

Let us assume that the 3 points based question be = x

Let us assume that the 4 points based question be = y

Let us assume that the 5 points based question be = z

As given

An instructor wants to write a test with 25 questions

than the equation become in the form

x + y + z = 25

he quiz to be worth a total of 100 points.

than the equation is becomes

3x + 4y + 5z =100

As given

He wants the number of 3-point questions to be 4 less than the number of 4-point questions

x = y -4

Than the three equation are

x + y + z = 25 ,3x + 4y + 5z =100 and x = y -4

put  x = y -4 in the x + y + z = 25 ,3x + 4y + 5z =100

than

2y + z = 29, 7y +5z= 112

multiply 2y + z = 29 by 5 and subtracted 7y +5z= 112

10 y -7y + 5y -5y = 145 -112

3y = 33

y = \frac{33}{3}

y =11

put in the  x = y -4

x = 11-4

x= 7

put the value of x ,y in the x + y + z = 25

7 + 11 +z =25

18 +z = 25

z = 25 -18

z=7

therefore

numbers of the 3 point question be = 7

numbers of the 4 point question be = 11

numbers of the 5 point question be = 7

Hence proved



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3 years ago
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8+7+3/4+2/4
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= 16 1/4
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Here-

Equation at the end of step  1  :
 
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Equation at the end of step  2  :

  (32x2 -  4xy) -  2y2Step  3  :

Trying to factor a multi variable polynomial :
 
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Final result :
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3 0
3 years ago
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Solve for x. −ax + 4b > 9 plz help me
likoan [24]

Answer:

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Step-by-step explanation:

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Remembering to reverse the inequality symbol when dividing by a negative quantity, thus

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7 0
3 years ago
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