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3 years ago

HELP PLEASEEEEEEEEEEEEEEEEEEEEEE ITS A GRADE

Mathematics

2 answers:

tigry1 [53]3 years ago

7 0

Answer:

B for the first graph (as x increases, y increases), D for the second graph (as x increases, y decreases), D for the third graph (minimum at y = -9), and A for the forth graph (the graph opens up because the a value in the equation is positive)

laiz [17]3 years ago

3 0

Answer:

as x increases, y increses

the parabola grows wider and taller, meaning that the y and x values will both increase:)

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The width of a rectangular room is 80%

katrin [286]

Answer:

12 feet

Step-by-step explanation:

Given: length = 15 feet, width = L x 80%

Unknown: width = ?

width = L x 80%

w = (15ft) x 80% or (15ft) x .80

w = 12 ft

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3 years ago

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What expression is equivalent to 4/2 times 4/3

In-s [12.5K]

Answer:

8/3

Step-by-step explanation:

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3 years ago

Find the length of BC. <br> A.) 14<br> B.) 9<br> C.) 2<br> D.) 3

Vera_Pavlovna [14]

Answer:

A) 14

Step-by-step explanation:

BC is congruent to DC in saying this you can plug the equations to each other and solve for y and then put its back into the equation for BC to get the length.

3y+5=5y-1

subtract 3y from both sides --> 5=2y-1

add 1 to both sides --> 6=2y

now get y alone, divide by 2 by both side --> y=3

plug y in back to 5y-1 --> 5x3-1

15-1

BC = 14

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3 years ago

A certain prescription drug diminishes in the system at a rate of 25% per hour. If a person was administered 1450mg of the drug,

Helen [10]

9514 1404 393

Answer:

459 mg
about 20 hours

Step-by-step explanation:

The decay factor is 1 -25% = 0.75 per hour, so the exponential equation can be written ...

r(t) = 1450·0.75^t . . . . . milligrams remaining after t hours

a) After 4 hours, the amount remaining is ...

r(4) = 1450·0.75^4 ≈ 458.79 . . . mg

About 459 mg will remain after 4 hours.

b) To find the time it takes before the amount remaining is less than 5 mg, we need to solve ...

r(t) < 5

1450·0.75^t < 5 . . . . use the function definition

0.75^t < 5/1450 . . . . divide by 1450

t·log(0.75) < log(1/290) . . . . . take logarithms (reduce fraction)

t > log(1/290)/log(0.75) . . . . . divide by the (negative) coefficient of t

t > 19.708

It will take about 20 hours for the amount of the drug remaining to be less than 5 mg.

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3 years ago

Brandon owes his brother $100. He will repay his brother $5 each week. Which expression gives the amount in dollars Brandon will

trasher [3.6K]

It’s b because n equals weeks so after the first week he has given back five dollars because 5 time 1 is 5.

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3 years ago

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