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3 years ago

Y and x have a proportional relationship, and y = 12 when x = 5. What is the value of y when x = 8?

Mathematics

1 answer:

blagie [28]3 years ago

7 0

Y=kx
12=5k
12/5=2.4
y=2.4*8
y=19.2

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Find the range of f(x)=-3x+1 if the domain is (-3,0,5)

wariber [46]

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3 years ago

7x²+3y²-28x-12y=-19

grigory [225]

Complete the square for x and y.

7x^2 + 3y^2 - 28x - 12y = -19

7x^2 - 28x + 3y^2 - 12y = -19

7(x^2 - 4x) + 3(y^2 - 4y) = -19

7(x^2 - 4x + 4) + 3(y^2 - 4y + 4) = -19 + 28 + 12

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3 years ago

A lion’s heart beats 12 times in 16 seconds.how many heartbeats will it have in 60 seconds?

Sergio [31]

Hey there!

Here is your answer:

The proper answer to this question is "44 times".

Reason:

You have to solve it this way:

12 heartbeats=16 seconds

16+16=32
36+16=48
48+16=64
16-12=4
12+12=36+8=44

Therefore lions heart beats 44 times every 60 seconds.

If you need anymore help feel free to ask me!

Hope this helps!

~Nonportrit

6 0

3 years ago

1. What is the difference between 6 and 3 A. 6+3 B. 6-3 C. 6/3 D. 6x3

antiseptic1488 [7]

Answer:

B. 6-3

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

A mine elevator was at a depth of -120 feet. After 15 seconds, the mine elevator was at a depth of -30 feet. What expression can

Dafna11 [192]

Answer:

The answers to the given question are:

i. The equipment elevator is at a depth of 176 feet (-176 feet), while the miner's elevator is at a depth of 210 feet (-210 feet) below the surface.

ii. The miner's elevator is deeper than that of the equipment.

The speed of an object is the rate at which the object moves.

i.e. speed =

Thus,

Speed of the equipment elevator = 4 feet per second

Speed of the miner's elevator = 15 feet per second.

Time of descent of the equipment elevator = 30 + 14

= 44 seconds

So that, the distance of the elevator at this time is;

speed =

⇒ distance = speed x time

= 4 x 44

= 176

distance = - 176 feet

The distance of the miner's elevator after 14 seconds is:

speed =

⇒ distance = speed x time

= 15 x 14

= 210

distance = - 210 feet

Thus, after another 14 seconds, the equipment elevator is at a depth of 176 feet (-176 feet), while the miner's elevator is at a depth of 210 feet (-210 feet) below the surface.

Therefore, the miner's elevator is deeper than that of the equipment.

Step-by-step explanation:

done

4 0

2 years ago