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2 years ago

In Mr. Diaz’s class, 20% of the students received a grade of “A” on their report cards. There are 25 students in

Mathematics

2 answers:

Simora [160]2 years ago

7 0

25/x=100/20 criss cross and u will get 500/100=5 then 5 students resivs A.

alexandr1967 [171]2 years ago

7 0

Im not sure but I think 5 because there are 25 students so put 25 in the denominator Set up a proportion Put 20 over 100 because percent means something over 100 25 times 4 is 100 20 divided by 4 is 5 So the answer is 5

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5400 J of energy is supplied to 3 kg of aluminum, by how much

solmaris [256]

Answer:

20°C

Step-by-step explanation:

Quantity if heat energy supplied is expressed as;

Q = mcΔt

m is the mass = 3kg

Δt is the temperature rise

Q = 5400J

c = 900 J/kg °C

Substitute

5400 = 3(90)Δt

5400 = 270Δt

Δt = 5400/270

Δt = 20°C

Hence the temperature rise is 20°C

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2 years ago

Write 3 different subtraction equations that equal 14.

borishaifa [10]

Answer:

17-3=14

37-23=14

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2 years ago

Read 2 more answers

Cory made 4{,}500 \text{ g}4,500 g4, comma, 500, start text, space, g, end text of candy. He saved 1\text{ kg}1 kg1, start text,

Len [333]

Your question is not well formatted and it's incomplete

Question goes thus:

Cory made 4500 g of candy. He saved 1 kg to eat later. He divided the rest of the candy over 7 bowls to serve at his party.

How many grams of candy did Cory serve in each bowl?

Answer:

There are 500 g of candy in each bowl served at the party

Step-by-step explanation:

Given

Size of candy = 4,500 g

Saved candy = 1 kg

Number of bowls = 7

Required

Size of candy served per bowl.

From the question, 1 kg of candy was saved to eat at a later time.

This means that the candy shared at the party is 1kg less than the total candy made.

Mathematically, we have

Shared candy = Total candy - saved candy

Shared candy = 4,500g - 1kg

----------------------------

Convert 1kg to grams

1 kg = 1,000 g.

----------------------------

So,

Shared candy = 4,500g - 1,000g

Shared candy = 3,500g

To get the size of candy in each bowl, we divide the shared candy by number of bowls.

Size of candy = 3,500 ÷ 7

Size of candy = 500.

Hence, there are 500 g of candy in each bowl served at the party

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2 years ago

The Cool Company determines that the supply function for its basic air conditioning unit is S(p) = 40 + 0.008p3 and that its dem

myrzilka [38]

We are given the functions:

S (p) = 40 + 0.008 p^3 ---> 1

D (p) = 200 – 0.16 p^2 ---> 2

T o find for the price in which the price of supply equals demand, all we have to do is to equate the two equations, equation 1 and 2, and calculate for the value of p, therefore:

S (p) = D (p)

40 + 0.008 p^3 = 200 – 0.16 p^2

0.008 p^3 + 0.16 p^2 = 160

p^3 + 20 p^2 = 20,000

p^3 + 20 p^2 – 20,000 = 0

Calculating for the roots using the calculator gives us:

p = 21.86, -20.93±21.84i

Since price cannot be imaginary therefore:

p = 21.86

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