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3 years ago

Which factoring method would be best to factor x^2 - 9?

Mathematics

1 answer:

Vinil7 [7]3 years ago

8 0

Answer:

D. difference of squares

Step-by-step explanation:

Both of the terms x^2 and 9 are squares, so their difference is the difference of squares. The factorization of that is a "special form" that can be usefully memorized.

a^2 -b^2 = (a -b)(a +b)

x^2 -9 = (x -3)(x +3)

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Round 6.432 to the nearest tenth.

fenix001 [56]

Answer:

6.4

Step-by-step explanation:

a number rounded to the nearest tenth is

$a.b$

so our number is

$6.432$

we can forget about the 2

$6.43$

so we can round it

since 3 is less than 5 we don't change the 4 to 5

$6.4$

7 0

3 years ago

You spin the spinner shown below once. The spinner has 4 equal sectors colored pink, purple, blue and green. What is p ( not pur

irakobra [83]

Answer:

It would be 0.75

Step-by-step explanation:

Probability=

Number of possible outcomes

Number of favorable outcomes

There are 3 favorable outcomes (pink, green, or blue).

There are 4 possible outcomes since there are 4 equal sectors.

P(not purple)= 3/4= 0.75

7 0

3 years ago

This is probley easy...

Yakvenalex [24]

Answer:

Step-by-step explanation:

divide 450 and 75

4 0

3 years ago

Read 2 more answers

7. QR = 8. Z P 24x - 2 Q 6x +14 R 102 ->

Dima020 [189]

Answer:

7Q ^12

Step-by-step explanation:

Porque se se suman la cuestione y porque solo me estás pagando con cinco puntos

6 0

3 years ago

What is the equation of the line that is paralle to y=3x-8 and passes thur the point (4,-5)

Brrunno [24]

⊰_________________________________________________________⊱

Answer:

The equation is-: y=3x

Step-by-step explanation:

$\large\displaystyle\text{$\begin{gathered} \sf{Substitute \ the \ values \ into \ the \ formula \ y-y_1=m(x-x_1)} \\ \sf {parallel \ lines \ have \ same \ slopes, \ thus} \\ \sf{slope \ of \ the \ 2nd \ line = 3}\\ \sf{now \ substitute \ the \ values} \\ \sf {y-(-5)=3(x-4)}\\ \sf{y+5=3(x-4) (It's \ Point-Slope\;Form, \ see \ below \ for \ slope-intercept)}\\ \sf {y+5=3x-12} \\ \sf{y=3x-12-5} \\ \sf{y-3x-17} \end{gathered}$}}$

$\pmb{\tt{done \ !!}}$

⊱_________________________________________________________⊰

4 0

2 years ago