I think of a number; take away 3 and then multiply by 7 to get the number 42. What was the number I started with?

Mathematics

1 answer:

torisob [31]2 years ago

3 0

Your answer should be “9” because 6x7=42

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Socket set for $36.00 with 40% off plus 8.25 % sales tax. How much do I owe?

OlgaM077 [116]

whatever% of anything is just (whatever/100) * anything.

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plus the 8.25% taxation, what is 8.25% of 21.6? well, is just (8.25/100) * 21.6, or 1.782.

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The area of a triangle is 180

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What is equal to 3 * 3 * 3 * 3 * 3

ladessa [460]

Answer:

243 or 3^5

Step-by-step explanation:

You can do the product by multiplying starting from the left.

3 * 3 * 3 * 3 * 3 =

= 9 * 3 * 3 * 3

= 27 * 3 * 3

= 81 * 3

= 243

You can also change it to an exponential form.

3 * 3 * 3 * 3 * 3 = 3^5

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3 years ago

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A system of equations and its solution are given below.

Fittoniya [83]

Answer: Option <span>C. To get system B, the second equation in system A was replaced by the sum of that equation and the first equation multiplied by -3. The solution to system B will be the same as the solution to system A.

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(-3)(x+6y=5)
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Sum of the second equation of system A and the first equation multiplied by -3:
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You would begin by choosing which trigonometric function to use.
In this case, you would use sine.

Sine is opposite over hypotenuse.
Opposite of the 35 degree angle is 18, and you want to find the hypotenuse which is x.

sin(35) = $\frac{18}{x}$ (multiply x to both sides)
x sin(35) = 18 (divide sin(35) to both sides)
x = 31.38204...

So, therefore x = 31.38. I don't know what decimal point you're supposed to round to, so I'm gonna guess the hundredths place. :)

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