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salantis [7]
3 years ago
5

Without doing the math, determine which is greater, 40 times 1/4 or 40 divided by 1/4. Explain your reasoning.

Mathematics
2 answers:
Vinil7 [7]3 years ago
6 0
40 times 1/4 is greater because you cant divide 1/4
Inessa05 [86]3 years ago
3 0
40÷1/4 because when you didvide it you get 160. When you multiply it, you get ten.
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Anna, Boris, and Clara thought of 1 number each Ana's number increased by 20 is 21 greater than boris's number decreased by 22.
sleet_krkn [62]

Answer:

Clara's number is 42 less than Anna's number

Step-by-step explanation:

We can start this problem out by setting our variables up:

A= Anna's number

B= Boris's number

C= Clara's number

so we can use them to build our equations. We can sepparate the problem into little more understandable pieces of information, let's start with the first piece of information:

- "Ana's number increased by 20"

A+20

- "boris's number decreased by 22"

B-22

- "21 greater than boris's number decreased by 22."

(B-22)+21

- "Ana's number increased by 20 is 21 greater than boris's number decreased by 22."

A+20=(B-22)+21

This is our first important equation here. Let's go with the second part of the problem:

- "Boris's number decreased by 20"

B-20

- "claras number increased by 22"

C+22

- "21 greater than claras number increased by 22"

(C+22)+21

Now the whole thing:

"Boris's number decreased by 20 is 21 greater than claras number increased by 22."

B-20=(C+22)+21

This is our second important equation.

So now we have the following system of equations:

A+20=(B-22)+21

B-20=(C+22)+21

We can now simplify the equations by combining like terms so we get:

Equation 1:

A+20=(B-22)+21

we can get rid of the parenthesis so we get:

A+20=B-22+21

We can subtract a 20 from both sides of the equation so we get:

A=B-22+21-20

We perform the subtractions so we get:

A=B-21

Equation 2:

B-20=(C+22)+21

We get rid of the parenthesis:

B-20=C+22+21

We add a 20 to both sides so we get:

B=C+22+21+20

We can now perform the additions so we get:

B=C+63

And now we can combine the equations. In this case we can substitute equation 2 into equation 1 to get:

A=C+63-21

We combine like terms to get:

A=C+42

We can subtract 42 from both sides to get:

C=A-42

which reads:

Clara's number is 42 less than Anna's number.

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3 years ago
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Answer:

The cosine of the angle is: negative

The sine of the angle is: positive

Step-by-step explanation:

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Determine the domain of the function.
nydimaria [60]
f(x)=\dfrac{4}{x^2}D:\ x^2\neq0\to x\neq0\\\\Answer:\ All\ real\ numbers\ except\ 0.
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The radius and height of a cone are 8 cm and 15 cm respectively find its curved surface are
drek231 [11]

Answer:

Curved surface area of a cone =πrl.

3.142×8×15=377.04cm

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!!!!!!!!!HELP ASAP!!!!!!! WORTH 20 POINTS
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F(x)=∛x

The domain will be all real numbers.

Answer: A) all real numbers.

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