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3 years ago

How do you solve this

Mathematics

1 answer:

IgorLugansk [536]3 years ago

6 0

First lets write out the equation:
-8x + 2x - 16 < -5x + 7x
Lets collect the x values

-6x - 16 < 2x
-8x - 16 < 0 (subtract both sides by 2x to get all the x's on one side)
-8x < 16 ( add both sides by 16 to get all the x's alone)
x < -2 ( divide both sides by -8 to get what just x is)

So x < -2

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Write 2x/3x in simplest form

STatiana [176]

The answer is $\frac{2}{3}$

*Remember x= $x^1$

You are technically dividing in this, whenever you divide anything with exponents, you subtract them. $x^1-x^1=0$

Therefore, the x's would cancel out, leaving just $\frac{2}{3}$

6 0

3 years ago

Read 2 more answers

Can someone pls help ASAP

Vera_Pavlovna [14]

Answer:

89.44

Step-by-step explanation:

using the Pythagorean Theorem: $a^{2} +b^{2}=c^{2}$

$80^{2} +b^{2} =120^{2} \\6400+b^{2} =14400\\b^{2} = 8000\\b = 40\sqrt{5}$

120 is the hypotenuse so it would be c in the equation.

To solve, I simplified and isolated the variable. I got the square root of 8000 simplified (but idk how to write that out lol)

This answer is closest to 89.44

*Hope this helped! Have a great day/ night wherever you are! : )*

3 0

3 years ago

Which equation is the inverse of y = x2 + 16?<br> 0 y=x²-16<br> y=i -16<br> y=+-16<br> y = x2 - 4

denpristay [2]

Answer:

y = ±√(x-16)

Step-by-step explanation:

To find the inverse of an equation, swap the x- and y-variables:

y = x² + 16

x = y² + 16

Then, solve for the y-variable:

x = y² + 16

y² = x - 16

y = ±√(x-16)

8 0

3 years ago

The sum of three consecutive numbers is 72. What are the smallest of these numbers?

lisov135 [29]

let "a number" = x

(x) + (x + 1) + (x + 2) = 72

Simplify. Combine like terms

3x + 3 = 72

Isolate the x. Note the equal sign. What you do to one side, you do to the other. Do the opposite of PEMDAS.

3x + 3 (-3) = 72 (-3)

3x = 72 - 3

3x = 69

3x/3 = 69/3

x = 69/3

x = 23

23 is the smallest number

hope this helps

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3 years ago

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Round 89,891 to the nearest ten-thousands place.

frez [133]

The ten thousands digit is the 8 to the left edge.

You need to increase this digit because the thousands digit is greater than zero.

The answer is 90,000.

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3 years ago