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krek1111 [17]
2 years ago
13

Answer all of em do it u wont

Mathematics
1 answer:
avanturin [10]2 years ago
7 0

Answer: 1. is 145 2. 60/100 is wrong because 3/5 is right 3.

figure out what is 40% of x and you get the answer when u add 87 which is 60% of x 4.no

Step-by-step explanation:

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If six girls can finish sweeping the floor of a hall in 45mins,how long will the same work take ten girls to do
AleksandrR [38]

Answer:

15 minutes i think

Step-by-step explanation:

45÷6=7.5

meaning 7.5 minutes per girl

so 4 girls would be 30 minutes of work

so 45-30=15

4 0
3 years ago
X and y are positive integers. explain why incorrect to claim that
dedylja [7]

You can find counterexamples to disprove this claim. We have positive integers that are perfect square numbers; when we take the square root of those numbers, we get an integer.

For example, the square root of 1 is 1, which is an integer. So if y = 1, then the denominator becomes an integer and thus we get a quotient of two integers (since x is also defined to be an integer), the definition of a rational number.

Example: x = 2, y = 1 ends up with \frac{2}{\sqrt{1}} = \frac{2}{1} which is rational. This goes against the claim that x/\sqrt{y} is always irrational for positive integers x and y.

Any integer y that is a perfect square will work to disprove this claim, e.g. y = 1, y = 4, y= 9, y = 16. So it is not always irrational.

4 0
3 years ago
Determine the discriminant of 3x2 - 5x + 4 = 0
iren [92.7K]
I thank the answer is B) 23 
4 0
3 years ago
Solve for x: 6/x = 4/8
Nuetrik [128]

Answer: x = 12

Step-by-step explanation:

\frac{6}{x} = \frac{4}{8}

cross multiply

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7 0
3 years ago
Someone help me simplify this 3t+12-9=
blondinia [14]

it's simple

3t+3

just this

7 0
3 years ago
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