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3 years ago

I will give brainliest if right!!!!!!!!

Mathematics

2 answers:

Readme [11.4K]3 years ago

3 0

Answer:

the last one

Step-by-step explanation:

because yes, thank you and bye

MatroZZZ [7]3 years ago

3 0

Answer:

The answer is the last one

Step-by-step explanation:

no explanation needed

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Use the completing the square method to find the roots of 2x^2+3x-15=13 include the steps, it would be greatly appreciated thank

ValentinkaMS [17]

Answer:

The roots are

$x1= \frac{-3+\sqrt{233}}{4}$

$x2= \frac{-3-\sqrt{233}}{4}$

Step-by-step explanation:

we have

$2x^{2}+3x-15=13$

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$2x^{2}+3x=13+15$

$2x^{2}+3x=28$

Factor the leading coefficient

$2(x^{2}+(3/2)x)=28$

Complete the square. Remember to balance the equation by adding the same constants to each side

$2(x^{2}+(3/2)x+(9/16))=28+(9/8)$

$2(x^{2}+(3/2)x+(9/16))=233/8$

$(x^{2}+(3/2)x+(9/16))=233/16$

Rewrite as perfect squares

$(x+(3/4))^{2}=233/16$

square root both sides

$(x+\frac{3}{4})=(+/-)\sqrt{\frac{233}{16}}\\ \\(x+\frac{3}{4})=(+/-)\frac{\sqrt{233}}{4}\\ \\x= -\frac{3}{4}(+/-)\frac{\sqrt{233}}{4}$

$x1= -\frac{3}{4}(+)\frac{\sqrt{233}}{4}=\frac{-3+\sqrt{233}}{4}$

$x2= -\frac{3}{4}(-)\frac{\sqrt{233}}{4}=\frac{-3-\sqrt{233}}{4}$

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3 years ago

Find the (f of f) (0) f(x)=3x-2

alina1380 [7]

First write (f o f)(x). This calls for us to use f(x) = 3x-2 as the input to f(x).

f(x) = 3x - 2 => f( ) = 3( ) - 2 Now subst. f(x) inside both sets of parentheses:

f(f(x)) (f o g)(x) = 3(3x-2) -2 = 9x - 6 - 2 = 9x - 8 (answer)

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4 years ago

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lord [1]

120 cubic feet is the answer.

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Please help me with this question :)

RSB [31]

Answer:

$\dashrightarrow \: { \tt{4x + 4 \leqslant 9x + 8}} \\ \\ \dashrightarrow \: { \tt{4x - 9x \leqslant 8 - 4}} \\ \\ \dashrightarrow \: { \tt{ - 5x \leqslant 4}}$

• divide either sides of the inequality by -5, also the sign will change:

$\dashrightarrow \: { \tt{x \geqslant - \frac{4}{5} }} \\$

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SCORPION-xisa [38]

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