2 years ago

If 35% of 300 children had zero cavities, how many children was that???

Mathematics

1 answer:

igomit [66]2 years ago

6 0

Answer:

105 children

Step-by-step explanation:

35/100×300

105

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Water has a specific heat of 4.184 J/g°C and requires 23,000 J of heat to raise the

nasty-shy [4]

Answer:

$m=80.840 kg$

Step-by-step explanation:

Given Data,

Q=23000 J

c=4.184 J/g °c

Δt= 68 °c

m=?

By using this equation,

Q=mcΔt

$23000=m\times 4.184\times 68\\\\m=\frac{23000}{4.184\times68} \\\\\\m=80.840 kg$

3 0

1 year ago

∠A=5x−18. ∠B=3x+42∘ solve for x and then find the measure of ∠A

KatRina [158]

Answer:

x = 30 ∠A = 132 degrees

Step-by-step explanation:

Set the equations equal to each other to solve for x

5x - 18 = 3x + 42

-3x - 3x Subtract 3x from both sides

2x - 18 = 42

+ 18 + 18 Add 18 to both sides

2x = 60 Divide both sides by 2

x = 30

Now plug this into the equation for angle A

∠A = 5(30) − 18 Multiply

∠A = 150 - 18 Subtract

∠A = 132 degrees

If this answer is correct, please make me Brainliest!

6 0

2 years ago

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A is equal to b squared plus four. Find a when b is five. ( a= b2 + 4 )

Norma-Jean [14]

Answer:

Step-by-step explanation:

5^2 = 5x5

=25+4

=29

5 0

2 years ago

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When finding the volume of a rectangle shaped 3D box, what formula do you use?

stiv31 [10]

Answer:

length x width x height

l x w x h

8 0

2 years ago

Pls help I’ll brainlest

mylen [45]

Y=5/2x

Or y=2.5x
Hope this helps

4 0

2 years ago