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Dafna1 [17]
3 years ago
7

Five pipes can fill a tank in 80 minutes. At the same rate, how long will it take 8 pipes to fill the same tank?

Mathematics
1 answer:
miss Akunina [59]3 years ago
8 0

Answer:

50 minutes

Step-by-step explanation:

it takes 80 minutes for 5 pipes

so for 1 pipe it will take 5x80=400min

and for 8 pipes it will take 400/8=50min

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You are making 2 cakes for your siblings. You want to make sure both cakes have the same
MrRissso [65]

Answer: GOOBLE GOBBLE

Step-by-step explanation: :P

3 0
3 years ago
Pythagoras question plz help
motikmotik
From the two right triangles, you can write the following equations using the Pythagorean theorem. Let's call that shared leg in the middle "y"

y^2 + b^2 = a^2
y^2 + c^2 = x^2


y^2 + b^2 = a^2
re-write this to get "y" alone for substitution.
y^2 = a^2 - b^2
substitute (a^2 - b^2) for y^2 in the other equation. y^2 + c^2 = x^2

a^2 - b^2 + c^2 = x^2

Now put in the values given for a,b,c to solve for x

(7.1)^2 - (5.6)^2 + (5.7)^2 = x^2
51.54 = x^2
square root
7.2 = x


6 0
3 years ago
Dante has been putting one penny in his bank every day. Now he has 161 pennies. For how many weeks has Dante been adding pennies
Bad White [126]
He has been adding pennies for 23 weeks. 161 / 7 = 23.
6 0
3 years ago
Read 2 more answers
Which matrix is equal to P + Q?
Afina-wow [57]
Answer: 
\begin{bmatrix}-1.1 & 9.5\\-5.7 & 0.8\\6.1 & 0.7\end{bmatrix}

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

Add up the corresponding elements

Row1,Column1: 6.1+(-7.2) = -1.1
Row1,Column2: 1.9+7.6 = 9.5
Row2,Column1: -7.5+1.8 = -5.7
Row2,Column2: 2.2+(-1.4) = 0.8
Row3,Column1: 3.8+2.3 = 6.1
Row3,Column2: -1.4+2.1 = 0.7

So that's why the answer is 
\begin{bmatrix}-1.1 & 9.5\\-5.7 & 0.8\\6.1 & 0.7\end{bmatrix}

3 0
3 years ago
The student council at Sparrowtown High School is making T-shirts to sell for a fundraiser, at a price of $12 apiece. The costs,
alexira [117]
Answer: 36 shirts and costs $432
step by step:
first make an equation with the amount of sold shirts being equal to cost of making them -
12x=10x+72 where x is the number of shirts
then, subtract 10x from 12x to get the variable on the same side -
2x=72
finally, divide by 2 to isolate x
x=36 shirts
to figure out the cost, substitute 36 for x in 10x+72
10(36)+72= 360+72= $432
6 0
3 years ago
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