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3 years ago

9

Solve for all values of x using the quadratic formula when the equation is x2 + 3x +2. use variables with proper assignments for

a, b and
c.

2 answers:

Anna007 [38]3 years ago

7 0

x = [-3 +/- √(3^2 - 4*1*2) ] / 2

= [- 3 + √( 1)] / 2 , [- 3 - √( 1)] / 2

= -2/2 , -4/2

= [-1, -2} answer

KengaRu [80]3 years ago

4 0

X x 3 + X x 2+ X x 3
Reorder the terms

3x + 2x + 3x
Collect the terms

= 8x

And that’s your final answer......

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Can someone help me with this.

kodGreya [7K]

Answer: 1/24 1/3

Step-by-step explanation:

6 0

2 years ago

A chef is going to use a mixture of two brands of Italian dressing. The first brand contains 8% vinegar, and the second brand co

jok3333 [9.3K]

Answer:

76 mL of 8% and 304 mL of 13%

Step-by-step explanation:

Set up a table like this (this is the same table for any mixture problem):

mL total * % vinegar = % vinegar/mL

8%

13%

total %

What you do with this table is multiply the first 2 columns and they equal the last column. We already know the middle column's entries from what we are given. But remember that a percent needs to be expressed as a decimal:

mL total * % vinegar = % vinegar/mL

8% .08

13% .13

total %

Now we also know that the total he wants to make is 380 mL that is 12%, so all that info goes into the last row:

mL total * % vinegar = % vinegar/mL

8% .08

13% .13

total % 380 .12

If he wants this total mixture to come from the 8% and the 13% vinegars, he is mixing them together, or adding them. We need to know how much 8% + how much 13% will give us 380 mL of 12%. So we can fill in the amounts accordingly. If he has x mL of 8%, then he will have 380 - x of 13%. The table tells us that we are multiplying the first 2 columns to get the third, so we will do that at the same time:

mL total * % vinegar = % vinegar/mL

8% x * .08 = .08x

13% 380 - x * .13 = .13(380 - x)

total % 380 * .12 = 45.6

Since we are adding the different vinegars together to get the total, we can do that with the last column as well. This is our equation:

.08x + .13(380 - x) = 45.6 Multiply everything through by 100 to get rid of the decimals now:

8x + 13(380 - x) = 4560 and

8x + 4940 - 13x = 4560 and

-5x = -380 so

x = 76

This means that there is 76 mL of 8% and 380 - 76 = 304 mL of 13%

8 0

3 years ago

What is 5 = p over 4

Gnoma [55]

Since it's p over four, which is a fraction, multiply each side by four. p = 20

3 0

3 years ago

What is the solution set of the following equation? 6x^2 = 13x + 5

fiasKO [112]

Answer:

2nd

Step-by-step explanation:

using the quadric formula

$- ( - 13) + - \sqrt{( - 3) {}^{2} - 4 \times 6( - 5) } \div 2 \times 6$

do the math and you get the second one.

{-1/3,5/2}

6 0

3 years ago

The Niagara Falls ferris wheel has a diameter of 48 meters, and one revolution takes 2.25 minutes to complete. Riders can see Ni

Yanka [14]

The time intervals when the riders could see Niagara falls are; 0.834 < t < 1.416 and (3.084, 3.666)

<h3>How to interpret Cycle Graphs?</h3>

From the diagram attached, we can say that;

Period = 2π/k

where;

k = 2π/2.25

k = 8π/9

Thus;

h(t) = -(48/2) cos (8π/9)t + ((48/2) + 0.5)

h(t) = -24cos (8π/9)t + 24.5

Riders can see Niagara falls if they are higher than 41 meters above the ground. Thus;

41 = -24cos (8π/9)t + 24.5

41 - 24.5 = -24cos (8π/9)t

16.5 = -24cos (8π/9)t

-0.6875 = cos (8π/9)t

cos⁻¹0.6875 = (8π/9)t

t = 0.834 min

Thus, time interval is between;

0.834 < t < (2.25 - 0.834)

⇒ 0.834 < t < 1.416 and

(2.25 + 0.834) < t < (2.25 + 1.416)

⇒ (3.084, 3.666)

Read more about Cycle Graphs at; brainly.com/question/24461724

#SPJ1

4 0

2 years ago