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2 years ago

Distribute 3(5x -1) thank you<3.

Mathematics

2 answers:

AysviL [449]2 years ago

7 0

Answer:

(3x5)+(3x-1) = 15+(-3)= 12

Step-by-step explanation:

There you go :)

lesya [120]2 years ago

7 0

Answer:

15x-3

Step-by-step explanation:

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Find the Roots of the following polynomial. <br><br> x3−5x2+6x = 0

ICE Princess25 [194]

Answer:

(1): "x2" was replaced by "x^2". 1 more similar replacement(s).

Step by step solution :

STEP

Equation at the end of step 1

((x3) - 5x2) - 6x = 0

STEP

Pulling out like terms

3.1 Pull out like factors :

x3 - 5x2 - 6x = x • (x2 - 5x - 6)

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2 years ago

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The square of 9 less than a number is 3 less than the number. What is the number?

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2 years ago

13....................

Mashcka [7]

13.

(a)

$y=-5x^2+21x-3$

for x = 2:

$y=-5(2)^2+21(2)-3=-20+42-3=19$

for x = 5

$y=-5(5)^2+21(5)-3=-125+105-3=-23$

(b)

The graph is:

(c)

Using the graph:

$\begin{gathered} x=1.8,y=18.6 \\ x=0.548,y=7 \\ x=3.65,y=7 \end{gathered}$ $\begin{gathered} x=1.8 \\ y=-5(1.8)^2+21(1.8)-3=-16.2+37.8-3=18.6 \end{gathered}$ $\begin{gathered} y=7 \\ -5x^2+21x-3=7 \\ -5x^2+21x-10=0 \end{gathered}$

Using the quadratic formula:

$\begin{gathered} x=\frac{-b\pm\sqrt[]{b^2-4ac}}{2a} \\ x=\frac{-21\pm\sqrt[]{21^2-4(-5)(-10)}}{2(-5)} \\ x=\frac{-21\pm\sqrt[]{241}}{-10} \\ x=0.54758 \\ or \\ x=3.6524 \end{gathered}$