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vodomira [7]
3 years ago
9

If x = 7, find the value of a) x2 b) (x + 3)*2

Mathematics
1 answer:
Fynjy0 [20]3 years ago
3 0

Answer:

a) 49

b) 100 (I'm assuming that the 2 was supposed to be a square)

Step-by-step explanation:

Substitute the value in for x (the value being 7):

7² = 49

(7 + 3)² = (10)² = 100

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ELEN [110]

since isosceles has 2 sides that are equal then,

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divide 162 by 2

162 ÷ 2 = 81

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8 0
3 years ago
Read 2 more answers
I need help im gonna post 3 more different questions pls answer them.
Arisa [49]

Answer:

15

Step-by-step explanation:

x³ - (3 + x)²

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8 0
3 years ago
Sec (of theta)=25/24<br> find cot(of theta)
Len [333]
If secant of theta = <span> <span> <span> 1.0416666667 </span> </span> </span> then
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4 0
4 years ago
Read 2 more answers
7x + 2y=24<br> 8x + 2y=30
Bumek [7]

Answer:

x=6 y=-9

Step-by-step explanation:

  • Layer the equations on each other as you would in a subtraction problem:

               8x + 2y=30

               7x + 2y=24  

  • Subtract the equation just like you would normally. This should leave 1x=6 or x=6.
  • Now that you have your x value, plug it in as x for one of the equations. For the 2nd equation, this leaves:

               42+2y=24 then

               2y=-18 then

               y=-9

  • Double check your y value by plugging x=6 into the first equation. This should also leave y=-9.

3 0
3 years ago
A piano, which normally sells for $800, is marked
belka [17]

Answer

700 is 87.5% of 800

Step-by-step explanation:

8 0
3 years ago
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