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3 years ago

Which is an equation? a. 17 + x b. 45 / x c. 20x = 200 d. 90 - x

1 answer:

6 0

C. 20x = 200 because an equation always has an equal sign and other three are expressions because it doesn't have any signs, hoped this helped:)

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An expression is shown, where a is a positive number less than 1, b is less than 0, and |a|<|b|.

Ipatiy [6.2K]

Answer:

B and D

Step-by-step explanation:

4 0

4 years ago

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HELP!!! ASAP!

Feliz [49]

The solution to given system of equations is $(x, y) = (\frac{-15}{263} , \frac{-115}{263})$

The given equation has one solution

Solution:

Given system of equations are:

12x - 13y = 5 --------- eqn 1

x = 23y + 10 --------- eqn 2

We have to solve the system of equations by substitution

Substitute eqn 2 in eqn 1

12(23y + 10) - 13y = 5

276y + 120 - 13y = 5

263y = 5 - 120

263y = -115

$y = \frac{-115}{263}$

Substitute the above value of "y" in eqn 2

$x = 23 \times \frac{-115}{263} + 10\\\\x = \frac{-2645}{263} + 10\\\\x = \frac{-2645 + 2630}{263}\\\\x = \frac{-15}{263}$

Thus the solution to given system of equations is $(x, y) = (\frac{-15}{263} , \frac{-115}{263})$

Thus the given equation has one solution

4 0

3 years ago

If the circumference of a circle is increased by 50%, then its area will be increased by (a) 100% (b) 125% (c) 150% (d) 75%

Svetradugi [14.3K]

Answer:

Hi, There!

Option B 125% Is the Most Accurate Answer

Step-by-step explanation:

Circumference is the distance around a plane shape. So, it also measures length.

Length and area of two similar shapes are related by the formula

$\frac{A_{1} }{A_{2} } =(_{} \frac{I_{1} }{I_{2\\ ^{~2~} }}$

Where the A in both cases represents area and the L represents length. But here the Ls will represent circumference.

Since the circumference of the circle increased by 50%, then the new circumference becomes

$l_{2} = l_{1} + 0.5l_{1} =1.5l_{1}$

Now subtracting from the original area then

$2.25 - 1=1.25$

This means that the area was increased by 1.25, which means 125%

Hence option B is the correct answer

7 0

3 years ago

What is π + π exactly?

yarga [219]

The answer is: " 2π " .
_____________________________________________

4 0

4 years ago

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What value of X guarantees that BC || DE?

Gemiola [76]

Answer:

Step-by-step explanation:

as BC║DE

so, AD:BD=AE:CE

or, CE=(BDₓAE)/AD

or, x=(5×16)/20=4

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3 years ago