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goldenfox [79]
3 years ago
13

What are the solutions to this quadratic equation? 5x2-7x-18=0

Mathematics
2 answers:
klio [65]3 years ago
8 0

open up the image so you can see the answer ! hope it helps you :)

sammy [17]3 years ago
4 0

Answer:

=

−

±

2

−

4

√

2

x=\frac{-{\color{#e8710a}{b}} \pm \sqrt{{\color{#e8710a}{b}}^{2}-4{\color{#c92786}{a}}{\color{#129eaf}{c}}}}{2{\color{#c92786}{a}}}

x=2a−b±b2−4ac​​

Once in standard form, identify a, b, and c from the original equation and plug them into the quadratic formula.

5

2

−

7

−

1

8

=

0

5x^{2}-7x-18=0

5x2−7x−18=0

=

5

a={\color{#c92786}{5}}

a=5

=

−

7

b={\color{#e8710a}{-7}}

b=−7

=

−

1

8

c={\color{#129eaf}{-18}}

c=−18

=

−

(

−

7

)

±

(

−

7

)

2

−

4

⋅

5

(

−

1

8

)

Step-by-step explanation:

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Each afternoon at least 40 people buy coffee in a coffee shop right in a quality that represents the situation let X represent t
Step2247 [10]

Answer: x ≥ 40

Step-by-step explanation:

Hi, to answer this question and write the inequality we have to analyze the information given:

Each afternoon at least 40 people buy coffee in a coffee shop

In Math, at least means more or equal (≥).

So, if X represents the number of people who buy coffee in an afternoon, the inequality is (Mathematically speaking) :

X ≥ 40

Feel free to ask for more if needed or if you did not understand something.

8 0
3 years ago
Josephine wanted to create a blueprint of her new rectangular garden she is planning on making in her backyard. She began to cre
vekshin1

Answer:

A: 500 square feet

Step-by-step explanation:

A: First you have to draw a grid.

You plot the points A,B, and C.

The fourth point would be -5,25 because it matches with the points.

You make a rectangle out of those points

Points AB is 2 feet. Since the interval I used was 5 I would multiply 2 by 5 to get 10.

Then I would find Points BC which is 10 feet. Again multiply it by 5 to get 50.

50 x 10 is 500.

B: Jenna has to reflect over the y-axis. This is because the y-axis is between Quadrants II and I. When reflecting over the y-axis the y-coordinate stays the same but the x-coordinate switches to it's opposite. Basically the x-coordinate is negative in Quadrant II, but in when reflecting over the y-axis the x-coordinate would change to a positive in Quadrant I. So if the point in Quadrant II looks like this: (-X,Y) then when reflecting over the y-axis to Quadrant I would look like this: (X,Y).

6 0
3 years ago
<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B5%7D%7B5%20%5Csqrt%7B6%20%2B%202%20%5Csqrt%7B3%7D%20%7D%20%7D%20%20%5Ctimes%20%28
Effectus [21]
Decimal form = 0.1702
4 0
2 years ago
Read 2 more answers
If one endpoint is (-6,4) and the midpoint is (4,8) what would be the other endpoint ???? if you can explain it would be great
krek1111 [17]
I believe the next one would be 13.2 because if you add 8.4 to -6.4 it gets 4.8 so you just do the same thing
8 0
3 years ago
If m∠A = 56°, m∠B = 60°, and c = 8, what is the measure of side length b?
Alekssandra [29.7K]

Using the law of sines:

\frac{b}{sin(B)}=\frac{c}{sin(C)}

Solve for b:

\begin{gathered} b=\frac{c\cdot sin(B)}{sin(C)} \\ so: \\ b=\frac{8\cdot sin(60)}{sin(64)} \\ b\approx7.708 \end{gathered}

Answer:

7.708

5 0
1 year ago
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