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tamaranim1 [39]
3 years ago
13

I NEED HELP ASAP IM DOING IT NOW. !!!!!!!!!!!!!!!!!!!!!!! Lily likes to collect records. Last year she had 12 records in her col

lection. Now she has 15 records. What is the percent increase of her ​collection?
Mathematics
2 answers:
ratelena [41]3 years ago
7 0

Answer:

12/10 =1.2 - 1 = 0.2 x 100 = 20%

Step-by-step explanation:

Aleksandr-060686 [28]3 years ago
4 0

Answer:

45% increased.

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What do -4 (x+7)-4 equal
Dima020 [189]

Answer:

-4x-32  Can i please get a brainliest because this correct.

Step-by-step explanation:

−4(x+7)−4

Distribute:

=(−4)(x)+(−4)(7)+−4

=−4x+−28+−4

Combine Like Terms:

=−4x+−28+−4

=(−4x)+(−28+−4)

=−4x+−32

Answer:

=−4x−32

5 0
3 years ago
See attached image. For part b, my answer is <img src="https://tex.z-dn.net/?f=h%28t%29%3D%5Cfrac%7Bt%5E2%7D%7B100%7D-%5Cfrac%7B
ArbitrLikvidat [17]

Answer:

a) shown

b) h = [sqrt(17) - (5/2)t]²

c) t = 2sqrt(17)/5 seconds

Step-by-step explanation:

V = pi × r² × h

V = pi × 5² × h

V = 25pi × h

a) dV/dt = dV/dh × dh/dt

-5pi × sqrt(h) = 25pi × dh/dt

dh/dt = -sqrt(h)/5

b) 1/sqrt(h) .dh = -5. dt

2sqrt(h) = -5t + c

t = 0, h = 17

2sqrt(17) = 0 + c

c = 2sqrt(17)

2sqrt(h) = -5t + 2sqrt(17)

sqrt(h) = [2sqrt(17) - 5t] ÷ 2

sqrt(h) = sqrt(17) - (5/2)t

Square both sides

h = [sqrt(17) - (5/2)t]²

c) empty: h = 0

0 = [sqrt(17) - (5/2)t]²

sqrt(17) - (5/2)t = 0

(5/2)t = sqrt(17)

t = 2sqrt(17)/5

t = 1.64924225 seconds

sqrt: square root

5 0
3 years ago
The square of a number is the input and the output is the number.
Dimas [21]
What is your question?????
5 0
3 years ago
Read 2 more answers
PLEASE HELP
Crank

Answer:

Listeriosis is an infection caused by the bacteria Listeria monocytogenes. People become infected by eating foods contaminated with the bacteria. Listeria may infect many different sites in the body, such as the brain, spinal cord membranes, or the bloodstream

Step-by-step explanation:

People with invasive listeriosis usually report symptoms starting 1 to 4 weeks after eating food contaminated with Listeria

5 0
2 years ago
Read 2 more answers
wrangler has 300 dollars to spend on school supplies. He spent 1/10 on notebooks. How much does he have left?
marshall27 [118]

Answer:

Step-by-step explanation:

<u>Method 1:</u>

$300 on school supplies

1/10 on notebooks

As you're finding how much is left:

10/10-1/10=9/10

Convert 9/10 into a decimal

9/10=0.9

300*0.9=$270

OR

<u>Method 2: </u>

1/10=0.1

300*0.1=$30

Take away 30 from $300

$300-30=$270

By using either method, You would still have $270 left.

How this helps!!!

Have a nice day :)

4 0
3 years ago
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