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lorasvet [3.4K]
4 years ago
10

Plz help 20 points answers

Mathematics
1 answer:
zhannawk [14.2K]4 years ago
7 0

Answer:A-3rd box

B-first box

C-first box

D-middle box

Step-by-step explanation:

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43.8,36.7____, 22.5,... find the missing number in the sequence
pantera1 [17]
The answer is 29.6.  

43.8-36.7=7.1

36.7-7.1=29.6

29.6-7.1=22.5

7 0
4 years ago
The y coordinate of the vertex of f (x)=-x^2+8x+7 is f(4)
azamat

Hello there.

To answer this question, we need to remember some properties about the vertex of quadratic functions.

Let f(x)=ax^2+bx+c,~a\neq0. Its vertex can be found on the coordinates (x_v,~y_v) such that x_v=-\dfrac{b}{2a} and y_v=-\dfrac{b^2}{4a}+c, in which y_v=f(x_v).

Using the coefficients given by the question, we get that:

x_v=-\dfrac{8}{2\cdot(-1)}\\\\\\ x_v=-\dfrac{8}{-2}\\\\\\ x_v=4

Thus, we have:

y=f(x_v)=f(4)

So the statement is true, because the x coordinate of the vertex of the function is equal to 4.~~\checkmark

7 0
3 years ago
PLS HELP I WILL GIVE BRAINLIEST
mr_godi [17]

Answer:

21 square feet

Step-by-step explanation:

To find out the area of this irregular figure, divide it into two rectangles and add their areas.. This can be done in two ways.

Version 1: 6 * 2 rectangle and 3 * 3 square

(6 * 2) + (3 * 3)

12 + 9

21 sq. ft.

Version 2: 5 * 3 rectangle + 2 * 3 rectangle

(5 * 3) + (2 * 3)

<em>You could really just do 7 * 3 here.</em>

7 * 3

21 sq. ft.

Either way, you still get 21 square feet as your answer.

5 0
3 years ago
Estimate the area of the top of a drum that has a radius of 14 inches
Anit [1.1K]
The equation for the area of a circle (as most drums are) is 
A= π · r² 
so knowing the radius to be 14, plug that in for r and A=196π, or about 615.4 inches squared
3 0
4 years ago
Find the slope of the line perpendicular to the line containing (0,0) and (-1,4).
Tema [17]

Answer:

Hello, Have a good day

Step-by-step explanation:

The slope of the perpendicular line is the opposite sign and the inverse of the original line's slope.

(-1,-2) and (0,0).

slope = (0 - -2)/(0 - -1) = 2/1

So ,inverse and opposite would be -1/2

A parallel line has the same slope with a different y intercept

-2 = (-1/2)(-1) + b

-2 = 1/2 + b

b = -5/2

So, same slope, different b (y intercept) for a parallel line.

8 0
3 years ago
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