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3 years ago

13

The set of whole numbers and their opposites

2 answers:

Elanso [62]3 years ago

4 0

Answer:

Integers

Step-by-step explanation:

klio [65]3 years ago

3 0

Integers hopefully that helps

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Find the area of the trapezoid.

goldenfox [79]

Answer:

<h3>105m²</h3>

Step-by-step explanation:

AREA=

$\frac{(a + b)}{2} \times h$

$\frac{15 + 6}{2} \times 10$

=105m²

6 0

3 years ago

IgorC [24]

Answer:

(1,-4) is in quadrant IV.

Step-by-step explanation:

3 0

3 years ago

The standard deviation for a set of data is 6.5. The mean is 255. What is the Margin of Error?

HACTEHA [7]

Answer: The margin of error is 12.74.

Step-by-step explanation:

Since we have given that

Standard deviation = 6.5

Mean = 255

Let 95% level of significance,

So, z value = 1.96

We need to find the "Margin of error":

So, it becomes :

Margin of error = Standard deviation × z-value

Margin of error = $6.5\times 1.96=12.74$

Hence, the margin of error is 12.74.

3 0

3 years ago

6a2 + 8a - 25 = -3<br> Using the Quadratic Formula

drek231 [11]

Answer:

6

2

+

8

−

2

5

=

−

3

6a^{2}+8a-25=-3

6

2

+

8

−

2

5

−

(

−

3

)

=

0

Step-by-step explanation:

0/3

4 0

2 years ago

Write an equation of the parabola with focus (0, -3) and vertex at the origin. Use z for the independent variable.

olchik [2.2K]

Answer:

z^2 = -12y

or y = -(z^2/12)

Step-by-step explanation:

Answer:

z^2 = -12y

Step-by-step explanation:

Given the vertex at origin;

This is same as (0,0)

The focus (0,-3)

The general form is;

(z-h)^2 = 4p(y-k)

(h,k) is the vertex (0,0); so h = 0 and k = 0

The focus is given as;

(h,k + p)

so ;

k + p = -3

but k =0

so p = -3

Thus, the equation of the parabola is;

(z-0)^2 = 4(-3)(y-0)

z^2 = -12y

4 0

3 years ago