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2 years ago

Factor completely: 1. 9x^2 + 3x − 90

Mathematics

1 answer:

malfutka [58]2 years ago

7 0

Answer:

9x^2+3x-90

81x+3x-90

84x-90 final answer

Step-by-step explanation:

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PLSSS HELP IM DESPERATE!!

Lapatulllka [165]

Answer:

graph c

Step-by-step explanation:

Given

| - 2x | = 4

The absolute value function always gives a positive result, however, the expression inside can be positive or negative , that is

- 2x = 4 or - (- 2x) = 4

Solving both

- 2x = 4 ( divide both sides by - 2 )

x = - 2

- (- 2x) = 4

2x = 4 ( divide both sides by 2 )

x = 2

The third graph indicates x = - 2 and x = 2 on the number line

8 0

3 years ago

1. (a) Use the integral test to show that P[infinity] n=1 1/n4 converges. (b) Find the 10th partial sum, s10, of the series P[in

scZoUnD [109]

Answer:

Step-by-step explanation:

a) $\int\limits^{\infty} _1 {\frac{1}{n^4} } \, dn\\ =\frac{n^{-3} }{-3}$

Substitute limits to get

= $\frac{1}{3}$

Thus converges.

b) 10th partial sum =

$\int\limits^{10} _1 {\frac{1}{n^4} } \, dn\\ =\frac{n^{-3} }{-3}$

= $\frac{-1}{3} (0.001-1)\\= 0.333$

c) Z [infinity] n+1 1 /x ^4 dx ≤ s − sn ≤ Z [infinity] n 1 /x^ 4 dx, (1)

where s is the sum of P[infinity] n=1 1/n4 and sn is the nth partial sum of P[infinity] n=1 1/n4 .

(question is not clear)

3 0

3 years ago

Solve: x + 1 < 4 and 3 - x > 5

Reika [66]

Answer:

okokok

Step-by-step explanation:

6 0

3 years ago

PLS HELPPPP<br> Solve 3x2 + 18x + 15 = 0 by completing the square. <br> I CANT FIND REAL ANSWER!

Dmitriy789 [7]

Answer:

x = − 1 , − 5

7 0

3 years ago

Read 2 more answers

Which expression matches this statement? Divide a number n by 9 and subtract 6 from the result.

leonid [27]

Answer:

\frac{n}{9}-6

Step-by-step explanation:

7 0

3 years ago