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Airida [17]
3 years ago
6

Find D

Mathematics
2 answers:
Snowcat [4.5K]3 years ago
7 0

Answer:

b. < D = 64°

I hope this helps

Tomtit [17]3 years ago
4 0

Answer:

I would say B. is your answer.

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The width of a rectangle is 8 cm less than its length. The perimeter of the rectangle is 52 cm.What is the width of the rectangl
astraxan [27]
Let X be width <span>of a rectangle, then
(x+8) - </span><span>length

(x+x+8)*2 = 52
x+x+8 = 52/2
2x+8 = 26
2x = 26-8
2x = 18
x = 18/2
x = 9 cm

Answer: 9 cm.</span>
6 0
4 years ago
What is the solution to the system of equations?
Leto [7]

Answer:

  1. (x, y) = (8, -1)
  2. (x, y) = (7, 10.5)

Step-by-step explanation:

1. You can use the expression for y to substitute into the first equation:

  2x +4(1/4x -3) = 12

  2x +x -12 = 12 . . . . . . eliminate parentheses

  3x = 24 . . . . . . . . . . . add 12; next divide by 3

  x = 8 . . . . . matches choice C

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2. You can use the expression for y to substitute into the second equation:

  x -2(2x -3.5) = -14

  -3x +7 = -14 . . . . . . eliminate parentheses

  21 = 3x . . . . . . . . . . add 3x+14; next divide by 3

  7 = x . . . . . matches the third choice

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When the answer choices are sufficiently different, you only need to find one value to determine which is the correct choice. (If you want to check your work further, you can substitute the other answer value into the two equations to see if it works.)

5 0
3 years ago
An electrician charges $40 per visit, and $20 per hour of work. On a particular day, he made 3 visits and calculated that his av
saw5 [17]

Answer:

  4 hours

Step-by-step explanation:

For three visits, the electrician earned $40 × 3 = $120 in "per-visit" charges. For working x hours, he earned 20x in "per-hour" charges. The total of these came to 50x:

  120 +20x = 50x

  120 = 30x . . . . . . . . subtract 20x

  4 = x . . . . . . . . . . . . . divide by 30

The electrician worked 4 hours that day.

3 0
3 years ago
Paramecia are unicellular protists that have contractile vacuoles to remove excess intracellular water. In an experimental inves
Oksanka [162]

Answer:

B)

Step-by-step explanation:

The contraction rate increases as the osmolarity decreases because of the reduced amount of ATP produced by cellular respiration

3 0
3 years ago
Yesterday Allen's heart beat 100,000 times. On average, how many times did it beat in a six-hour period yesterday?
PilotLPTM [1.2K]

Answer:

100

Step-by-step explanation:

4 0
4 years ago
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