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djverab [1.8K]
4 years ago
6

Hello can you help me please?) please answer question 3 and 7

Mathematics
2 answers:
SVEN [57.7K]4 years ago
5 0
The independent variable for 3 would be how many hours are spent, while the dependant variable is how much is earned, the function would be y= 50x (total money, y, equals 50• hours worked), when 6 (for the hours) is plugged into the equation, y (total money earned) would be 300.

Question 7's independent variable is how many hours are worked, while the dependant variable is how much is earned, once again, it would mean y=17.75x (total money, y, is equal to 17.75, the price for each, multiplied by x, the amount sold). Which would mean that for 5 DVDs, the price would be 88.75
Lilit [14]4 years ago
3 0

3.

1h - $50

xh - x · $50

f(x) = 50x

x = 6 → f(6) = (50)(6) = 300

Answer: $300.


7.

1DVD - $17.75

xDVD - x · 17.75

f(x) = 17.75x

x = 5 → f(5) = (17.75)(5) = 88.75

Answer: $88.75

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In ΔIJK, the measure of ∠K=90°, KI = 3.8 feet, and JK = 6.7 feet. Find the measure of ∠I to the nearest degree.
nika2105 [10]

Answer:

60

Step-by-step explanation:tanI=  

adjacent

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​  

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5 0
3 years ago
What is f(3a-1)=12a-7 <br> (Show step-by step)
anastassius [24]

what variable are we to find?

8 0
3 years ago
The probability that a student guesses the correct answer to a five​-choice multiple choice question is ​P(correct)=0.2 or 1/5.
Zinaida [17]

Answer:

13

Step-by-step explanation:

when you multiply 65 by .2 that is the predicted number of right answers if they were to guess on every one.

5 0
3 years ago
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Bella and Heather put some money into their money boxes every week. The amount of money (y), in dollars, in their money boxes af
ss7ja [257]

ANSWER

10 weeks, $310


EXPLANATION

We have a system of linear equations as both equations need to be satisfied by the same ordered pair (x,y):


y = 25x + 60

y = 30x + 10


We can solve this by substitution. Since y is equal to 25x+60, we can substitute in 25x + 60 for y in the equation y=30x+10


y = 30x + 10

25x + 60 = 30x + 10


Subtract 25x from both sides


60 = 5x + 10

Subtract 10 from both sides and then divide both sides by 5


50 = 5x

x = 10


x represents time in weeks, so 10 weeks.


Find y, the amount of money, by substituting x=10 into either equation.

If we use y = 30x + 10, then


y = 30x + 10

y = 30(10) + 10

y = 300 + 10

y = 310


y = 310 implies $310 so the answer is 10 weeks, $310.

8 0
3 years ago
Read 2 more answers
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