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givi [52]
3 years ago
9

Twice the difference of a number and 9 equals 7

Mathematics
2 answers:
shusha [124]3 years ago
8 0

Answer:

2(X - 7) = 9.

Step-by-step explanation:

Twice means muliply by 2. -The difference of a number and 7 means subtract a number/variable and 7. -Is equal to 9 means =9. 2(X - 7) = 9.

Oxana [17]3 years ago
6 0
2(x-9)=7 solve and you would get the answer
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Solve for x. <br><br> x = ___°
irina [24]

x = 109

this is pentagon

the sum of the interior angles of a polygon is

sum = 180°( n - 2) where n is the number of sides.

sum = 180° × 3 = 540° thus

x + 121+ 108 + 102 + 100 = 540

x + 431 = 540

subtract 431 from both sides

x = 540 - 431 = 109



6 0
3 years ago
Gambling at a slot machine is an example of which reinforcement schedule?
gogolik [260]

Answer:

d. Variable ratio

Step-by-step explanation:

We are asked to determine that gambling at a slot machine is an example of which reinforcement schedule.

Let us see our given choices one by one.

a. Fixed ratio

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We know that in fixed interval schedule the first response is rewarded only after a specified amount of time has elapsed. An example of fixed interval schedule is weekly paycheck.

c. Variable interval

We know that in variable interval schedule, the reinforcement is delivered at changing and unpredictable intervals of time.

d. Variable ratio

In variable ratio schedule, a response is reinforced after an unpredictable number of responses. Gambling and lottery are examples of variable ratio.

Therefore, option 'd' is the correct choice.

8 0
3 years ago
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3 years ago
38. By the commutative property, 3(w +9) is
taurus [48]

Answer:

B

Step-by-step explanation:

3 ( w + 9 )

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Read 2 more answers
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SSSSS [86.1K]
The answer would be 65°.
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