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3 years ago

I need help on number 11-13 please

Mathematics

1 answer:

schepotkina [342]3 years ago

8 0

The answer to number 13 is141

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What is the value of x in the diagram?

Natali5045456 [20]

Set up a ratio:

25 / 15 = x / 9

Now cross multiply:

25 * 9 = 15 * x

Simplify:

225 = 15x

Divide both sides by 15:

x = 225 / 15

x = 15

8 0

2 years ago

Tamara caught a fish that weighs 5.6 pounds. Victoria

anastassius [24]

Answer:

2.2 pounds

Step-by-step explanation:

Your welcome

4 0

2 years ago

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What are the solutions of x2-4x+5=0 <br> please help!!

goldfiish [28.3K]

Answer:

The solutions to the quadratic equation are:

$x=i+2,\:x=-i+2$

Step-by-step explanation:

Given the equation

$x^2-4x+5=0$

solving the equation

$x^2-4x+5=0$

subtract 5 from both sides

$x^2-4x+5-5=0-5$

$x^2-4x=-5$

$\mathrm{Add\:}\left(-2\right)^2\mathrm{\:to\:both\:sides}$

$x^2-4x+\left(-2\right)^2=-5+\left(-2\right)^2$

$\left(x-2\right)^2=-1$

$\mathrm{For\:}f^2\left(x\right)=a\mathrm{\:the\:solutions\:are\:}f\left(x\right)=\sqrt{a},\:-\sqrt{a}$

solving

$x-2=\sqrt{-1}$

As the imaginary rule is given by

$\:\sqrt{-1}=i$

$x-2=i$

$x=i+2$

solving

$x-2=-\sqrt{-1}$

$x-2=-i$ ∵ $\:\sqrt{-1}=i$

$x=-i+2$

Therefore, the solutions to the quadratic equation are:

$x=i+2,\:x=-i+2$

8 0

3 years ago

A cube has a volume of 125 cubic inches. What is the length of each edge? Enter your answer in the box.

maxonik [38]

The length of of each edge is 5 ft.

If the edge of the cube is marked as a, the the volume can be calculated as V = a³, so here given the $a= \sqrt[3]{V} = \sqrt[3]{125}=5$ volume V, we car write that:

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3 years ago

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How to extract the square root?

inessss [21]

its kind of hard to explain, but lets say you need to find the square root of 64. what ever is multiplied by itself two times will equal something. So you prob. know that 64 divided by 8 equals 8, so 8 squared equals 64 since u multiply it 2 times, so the sqaure root of 64 would be 8

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3 years ago