All categories

3 years ago

I need help with #5 as well thank you

Mathematics

1 answer:

Mashutka [201]3 years ago

5 0

Answer:

Answer (4)

Step-by-step explanation:

2x^2 - x - 10 = 0

x^2 - 1/2*x - 5 = 0

x = 1/4 ± √(1/16 + 80/16) = 1/4 ± √(81/16) = 1/4 ± 9/4

x1 = -8/4 = -2 or x2 = 10/4 = 2.5

Answer (4)

You might be interested in

Can someone help me with this?

Liula [17]

Answer: Ben made 16 salted pretzles.

step by step:

I multiplied 19 and 2 to find the whole the subtracted 22 from the whole and found 16

7 0

4 years ago

What is the sum of the infinite geometric series? Sigma-Summation Underscript n = 1 Overscript 4 EndScripts (negative 144) (one-

Irina18 [472]

The sum of the infinite geometric series is -288.

<h2>Given that</h2>

A finite geometric series with n = 4, a₁ = -144, and r = ½.

<h3>We have to determine</h3>

What is the sum of the infinite geometric series?

<h3>According to the question</h3>

The sum of the infinite is determined by the following formula;

$\rm S\infty = \dfrac{a_1(1-r^n)}{1-r}\\\\$

A finite geometric series with n = 4, a₁ = -144, and r = ½.

Substitute all the values in the formula;

$\rm S\infty = \dfrac{a_1(1-r^n)}{1-r}\\\\S\infty = \dfrac{-144 (1- \dfrac{1}{2}^4)}{1-\dfrac{1}{2}}\\\\S \infty = \dfrac{-144 \times \dfrac{15}{16}}{\dfrac{1}{2}}\\\\S \infty = -270$

Therefore,

The sum of the infinite geometric series is,

$\rm S = \dfrac{a_1}{1-r}\\\\S=\dfrac{-144}{1-\dfrac{1}{2}}\\\\S = \dfrac{-144}{0.5}\\\\S = -288$

Hence, the sum of the infinite geometric series is -288.

To know more about Geometric Series click the link given below.

brainly.com/question/16037289

5 0

3 years ago

A student has 8 pints of iced tea in a pitcher. The amount of iced tea in the pitcher is a function of x, the amount of iced tea

Reptile [31]

Answer: The domain is:

0 pints ≤ x ≤ 8 pints.

Step-by-step explanation:

When we have a function:

y = f(x)

The domain is the set of the possible values of x (the possible inputs).

In this case, the value of x represents the amount of tea that she has poured from the pitcher.

Now, initialy the pitcher has 8 pints, so the smallest possible value of x is 0 pints (when she has not pured anithing) and the maximum value of x is 8 pints (when she has poured all the 8 pints).

So we have the domain:

0 pints ≤ x ≤ 8 pints

3 0

3 years ago

Choose the ratio that is equivalent to this one: 7/3<br> A) 21/6, B) 21/9, C) 9/21

gogolik [260]

Answer:

B) 21/9

Step-by-step explanation:

21/9 / 3/3 = 7/3

Hope this helps you out ;)

5 0

3 years ago

Read 2 more answers

Trig help ..........

erastovalidia [21]

Letter D

1-sin^2(x) = cos^2(x)

= sin^2(x)/cos^2(x)
= tan^2(x)

3 0

4 years ago