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Shalnov [3]
3 years ago
9

Use a graphing calculator to sketch the graph of the quadratic equation and then give the coordinates for the x-intercepts (if t

hey exist) y=x2+7x+10 A (-2,0),(5,0) B (2,0);(-5,0) C (2,0);(5,0) D (-2,0);(-5,0)

Mathematics
1 answer:
Nataly [62]3 years ago
3 0

Answer:

Option D.

Step-by-step explanation:

The given quadratic equation is

y=x^2+7x+10

We need to draw the graph of given equation by using graphing calculator as shown below.

From the graph it is clear that the parabola intersect the x-axis at points (-2,0) and (-5,0). So, the x-intercepts are (-2,0) and (-5,0).

Therefore, the correct option is D.

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IrinaVladis [17]

Answer:

12

Step-by-step explanation:

7*3=21 so 4*3=12

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3 years ago
3y/5 = 15 the value of y is
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Step-by-step explanation:

\frac{3y}{5}  = 15 \: cross \: multiply \: you \: have \: 3y = 75 \: which \: is \: 25

4 0
3 years ago
A group of three undergraduate and five graduate students are available to fill certain student government posts. If four studen
creativ13 [48]

Answer:

Pr = 0.4286

Step-by-step explanation:

Given

Let

U \to\\ Undergraduates

G \to Graduates

So, we have:

U = 3; G =5 -- Total students

r = 4 --- students to select

Required

P(U =2)

From the question, we understand that 2 undergraduates are to be selected; This means that 2 graduates are to be selected.

First, we calculate the total possible selection (using combination)

^nC_r = \frac{n!}{(n-r)!r!}

So, we have:

Total = ^{U + G}C_r

Total = ^{3 + 5}C_4

Total = ^8C_4

Total = \frac{8!}{(8-4)!4!}

Total = \frac{8!}{4!4!}

Using a calculator, we have:

Total = 70

The number of ways of selecting 2 from 3 undergraduates is:

U = ^3C_2

U = \frac{3!}{(3-2)!2!}

U = \frac{3!}{1!2!}

U = 3

The number of ways of selecting 2 from 5 graduates is:

G = ^5C_2

G = \frac{5!}{(5-2)!2!}

G = \frac{5!}{3!2!}

G =10

So, the probability is:

Pr = \frac{G * U}{Total}

Pr = \frac{10*3}{70}

Pr = \frac{30}{70}

Pr = 0.4286

5 0
2 years ago
Can someone please help me with this problem? I tried inputting the numbers into the standard deviation equation but I did not g
Juliette [100K]

Answer:

97.8

Step-by-step explanation:

add together 97.3 +0.5

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2 years ago
4 Pre-Algebra questions PLEASE HELP ME?
Juliette [100K]
What is the math problem?
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3 years ago
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