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Natalija [7]
3 years ago
9

When X=5 and y=10 in the formula A =xy-20. Find A​

Mathematics
1 answer:
Delicious77 [7]3 years ago
3 0

Answer:

A = 30

Step-by-step explanation:

x = 5

y = 10

A = xy - 20

substitute 5 and 10 in the place of x and y

(5*10) - 20

50 - 20

30

A = 30

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Which expression has a value of 3?
Marina86 [1]

Step-by-step explanation:

3(4 *to the power of 2* - 3*to the power of 2*)

  • 3(4²-3²)
  • 3(16-9)
  • 3(7)
  • 21

24-23 x 3

  • 24-23×3
  • 24-69
  • -45

3*to the power of 3* - 3*to the power of 2

  • 3³-3²
  • 9-6
  • 3

(6*to the power of 2* - 3) (9*to the power of 2* - 70)

  • (6²-3)(9²-70)
  • (36-3)(81-70)
  • (33)(11)
  • 363

Hence, Option d. is the correct answer because it gives answer 3 when it is solved.

6 0
2 years ago
The function f(x), shown in the graph, represents an exponential growth function. Compare the average rate of change of
svetoff [14.1K]

Answer:0

Step-by-step explanation:

6 0
2 years ago
What is 7/8 of 8/9?<br><br> if you could, include an explanation.<br> thanks
storchak [24]

Answer:

63/64

Step-by-step explanation:

cross multiplication

7*9=63

8*8= 64

4 0
3 years ago
Read 2 more answers
Evaluate x ÷ y for x = 3 and y = 12. Your answer: A. 0.25 B. 4 C. 9 D. 36
aev [14]

Answer:

B or D

Step-by-step explanation:

best bet is B

3 0
3 years ago
Read 2 more answers
15. A rectangle has a length of 2x - 1 and a width of 3x + 7. Find the perimeter of this rectangle.
andrew11 [14]

Answer:

10x + 12 and 6x² + 11x - 7

Step-by-step explanation:

The perimeter (P) of a rectangle is calculated as

P = 2l + 2w ( l is length and w is width )

   = 2(2x - 1) + 2(3x + 7) ← distribute parenthesis

    = 4x - 2 + 6x + 14 ← collect like terms

     = 10x + 12

--------------------------------------------------

The area (A) of a rectangle is calculated as

A = lw

   = (2x - 1)(3x + 7) ← expand using FOIL

    = 6x² + 14x - 3x - 7 ← collect like terms

    = 6x² + 11x - 7

7 0
3 years ago
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