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spin [16.1K]
3 years ago
11

A man and his daughter together weigh 90 kg, the man with his cat weigh 70 kg, and the daughter and the cat together weigh 40 kg

. What do the man, the daughter and cat weigh together?
Mathematics
1 answer:
jarptica [38.1K]3 years ago
8 0
I think the answer is 100kg because it could be that the dad weighs 60kg and the daughter weighs 30kg...so the cat must weigh 10kg...


60kg+30kg+10 kg=100kg
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2 years ago
5x + 7y = 25<br> 5x - 2y = -65<br> solve using elimination<br> (step by step please)
aliina [53]

5x+7y=25

5x-2y=-65

subtract both of the equations

5x-5x=0

7y--2y= 7y+2y=9y

25--65=25+65=90

0+9y=90

9y=90

divide both sides by 9 to get y by itself

9y/9=90/9

cross out 9 and 9 which becomes 1*1*y=y

90/9=10

y=10

find x by using the substitution method

5x+7y=25

5x+7(10)=25

5x+70=25

move +70 to the other side

sign changes from +70 to -70

5x+70-70=25-70

5x=-45

divide both sides by 5 to get x by itself

5x/5=-45/5

cross out 5 and 5 then becomes 1*1*x=x

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x=-9

answer:

(-9,10)

6 0
3 years ago
What is the measure of A
Art [367]

Answer:

66+x=180°

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4 0
3 years ago
Alex needs to buy compressed air to fill empty cylindrical tanks for his tire store. Each tank is 12 feet deep and has a radius
agasfer [191]
---------------------------------------
Formula
---------------------------------------
Volume = πr²h

---------------------------------------
Find Volume of one tank
---------------------------------------
Volume of 1 tank = πr²h
Volume of 1 tank = 3.14 x 6² x 12
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Find Volume of 5 tanks
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Volume of 1 tank = 678.24
Volume of 5 tanks = 678.24 x 5 
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Answer: 3391.2 ft³
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Answer:

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Step-by-step explanation:

4 0
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