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2 years ago

Question 2 Which of the following is not shown on the scatter plot below?

Mathematics

1 answer:

Anton [14]2 years ago

6 0

Answer:

Step-by-step explanation:

Outlier

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Factor the quadratic equation below to reveal the solutions. X^2+4x-21=-9

a_sh-v [17]

Answer:

x = 3 and x = -7

Step-by-step explanation:

The given quadratic equation is $x^2+4x-21=0$ . We need to find the solution of this equation.

If the equation is in the form of $ax^2+bx+c=0$ , then its solutions are given by :

$x=\dfrac{-b\pm \sqrt{b^2-4ac} }{2a}$

Here, a = 1, b = 4 and c = -21

Plugging all the values in the value of x, such that :

$x=\dfrac{-b+ \sqrt{b^2-4ac} }{2a},\dfrac{-b- \sqrt{b^2-4ac} }{2a}\\\\x=\dfrac{-4+ \sqrt{(4)^2-4\times 1\times (-21)} }{2(1)},\dfrac{-4- \sqrt{(4)^2-4\times 1\times (-21)} }{2(1)}\\\\x=3, -7$

So, the solutions of the quadratic equation are 3 and -7.

6 0

2 years ago

I need help with this math problem?

Nuetrik [128]

Answer:

401.92u^3

Step-by-step explanation:

Volume for a cylinder=(pi*r^2)*h because it is the area of the circle times the height of the cylinder so,

(3.14*4^2)*8=401.92

3 0

2 years ago

Enter the coordinates of the point on the unit circle at the given angle. 135° (-VII, VI Enter

vekshin1

Related angle is 45 degrees, set up a triangle and use exact trig values to solve for x and y, then rationalise the denominators

4 0

2 years ago

the variables x and y vary inversely with a constant variation of 7. Use the variation formula, k=xy, to find why when x=9

dolphi86 [110]

1.Make y the subject

k = xy

k/x = xy/x

y = k/x

2.Substitute

y = k/x

y = 7/9

y = 0.777......

y = 0.8 (Answer)

To confirm

k = xy

k = 9 × 0.8

k = 7.2

k = 7 (constant)

Hope it helps☺

7 0

2 years ago

Please help... #18 and #28

Vesna [10]

I hope this helps you

5 0

2 years ago

Read 2 more answers