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3 years ago

Help me please I really don’t get this

Mathematics

1 answer:

pishuonlain [190]3 years ago

7 0

Answer:

y equals 45, because you substitute the x in the bigger equation with -2, and then solve for y

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Find the inverse of the following functions?<br> Y=x^2+2

pshichka [43]

   f(x) = x² + 2
   y = x² + 2
         x = y² + 2
    x - 2 = y²
√(x - 2) = y
√(x - 2) = f⁻¹(x)

8 0

4 years ago

Given: ΔPSQ, PS = SQ

horrorfan [7]

<h2>Answer:</h2>

To solve this problem we will use Heron's formula:

$A=\sqrt{s(s-a)(s-b)(s-c)}$

Where $a, \ b \ and \ c$ are the side lengths of the triangle and $s$ is the semiperimeter (half the perimeter of the triangle). We know that:

$Perimeter \ P=\triangle PSQ=PS+PQ+SQ: \\ \\ \triangle PSQ=P=50 \\ \\ Semiperimeter \ s: \\ \\ s=\frac{P}{2}=25$

Also:

$(I) \ PS=SQ \\ \\ (II) \ SQ-PQ = 1 \\ \\ (III) \ PS+PQ+SQ=50 \\ \\ \\ (I) \ into \ (III): \\ \\ SQ+PQ+SQ=50 \\ \\ \therefore (IV) \ 2SQ+PQ=50 \\ \\ From \ (II): \\ \\ PQ=SQ-1 \\ \\ (II) \ into \ (IV): \\ \\ 2SQ+(SQ-1)=50 \\ 3SQ-1=50 \\ 3SQ=51 \\ \\ \boxed{SQ=17} \\ \\ \boxed{PS=17} \\ \\ PQ=SQ-1=17-1 \therefore \boxed{PQ=16}$

Finally:

$A=\sqrt{s(s-a)(s-b)(s-c)} \\ \\ A=\sqrt{s(s-PS)(s-SQ)(s-PQ)} \\ \\ A=\sqrt{s(s-17)(s-17)(s-16)} \\ \\ A=\sqrt{25(25-17)(25-17)(25-16)} \\ \\ \boxed{A=120}$

7 0

3 years ago

If the mean of the four numbers 4, 8,x and 12 is 10,then x is

ohaa [14]

Answer:

x = 16.

Step-by-step explanation:

hope this helps

8 0

3 years ago

In 2012, entering freshmen at the UA have an average ACT score of 25.4 with a standard deviation of 2.1. 1. What is the probabil

astra-53 [7]

Answer:

P [ Z > 24,1 ] = 72,24 %

Step-by-step explanation:

P [ Z > 24,1 ] = 1 - P [ Z < 24,1 ]

P [ Z < 24,1 ] = ( Z - μ₀ ) / σ

P [ Z < 24,1 ] = ( 24,1 - 25,4) / 2,1

P [ Z < 24,1 ] = - 1,3/ 2,1

P [ Z < 24,1 ] = - 0,6190 ≈ - 0,62

We look in z-table and find for z(score) -0,6190

P [ Z < 24,1 ] = 0,27763

Then

P [ Z > 24,1 ] = 1 - 0,27763

P [ Z > 24,1 ] = 0,72237 ⇒ or P [ Z > 24,1 ] = 72,24 %

4 0

3 years ago

I have to make two paragraphs each one about jobs that contain math. The jobs i have to use are store manager and Game progra

jok3333 [9.3K]

A store manager use numbers by having to check each register. Another way a store manager uses numbers is by counting money. And knowing what food (ex. meats, cereals,eggs,milk) is coming in amg when.
A game programmer uses number with his/her job is by have to code their character to move. Another way a game programmer uses numbers is by having to know how to add codes to there game.

8 0

3 years ago

Read 2 more answers