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IgorLugansk [536]
3 years ago
13

Perform the operation. (9x2 - 8) - (-4x2 - 5x)Anyone know this one?​

Mathematics
1 answer:
Degger [83]3 years ago
7 0

Answer:

5x+18

Step-by-step explanation:

9 x 2-8-(-4 x 2-5x)

18-8-(-4 x 2-5x)

18-8-(-5x-8)

18-8+8+5x

Please give Brainliest

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Solve the system of equations.<br><br> y=3x<br> y=x^2-10
puteri [66]

Answer:

y=3x.........1

y=x^2-10.......2

substituting value of eq 1 to 2

3x=x^2-10

x^2-10-3x=0

x^2-3x-10=0

x^2-5x+2x-10=0

X(x-5)+2(x-5)=0

(x-5)(X+2)=0

then

X=5 or X=-2

again

y=??

when X=5

y=3×5=15

when X=-2

y=-6

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3 years ago
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Find 2× - 2y + 5z - 2x - y + 3z
natka813 [3]
<span>-3y+8z your welcome:)</span>
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Order these numbers from least to greatest. −14.2 , −14313 , 14110 , −202
Firlakuza [10]
-14313,-202,-14.2,14110
4 0
3 years ago
HELP<br>match the function with its inverse​
Gre4nikov [31]

Answer:

1st row 3 down

Step-by-step explanation:

7 0
2 years ago
50 POINTS !!<br><br><br> PLEASE HELP !! ILL GIVE BRAINLIEST TO THE RIGHT ANSWERS.
maks197457 [2]

Answer:

16

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Trigonometry</u>

[Right Triangles Only] Pythagorean Theorem: a² + b² = c²

  • a is a leg
  • b is another leg
  • c is the hypotenuse<u> </u>

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify variables</em>

Leg <em>a</em> = <em>a</em>

Leg <em>b</em> = 12

Hypotenuse <em>c</em> = 20

<u>Step 2: Solve for </u><em><u>a</u></em>

  1. Substitute in variables [Pythagorean Theorem]:                                            a² + 12² = 20²
  2. Evaluate exponents:                                                                                         a² + 144 = 400
  3. [Subtraction Property of Equality] Isolate <em>a</em> term:                                           a² = 256
  4. [Equality Property] Square root both sides:                                                    a = 16
3 0
3 years ago
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