3 years ago

What is the value of y?

Mathematics

1 answer:

SVETLANKA909090 [29]3 years ago

8 0

Answer:

Step-by-step explanat

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I need help please!!

Ivan

1.86
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4 years ago

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Radda [10]

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Step-by-step explanation:

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3 years ago

Substitute x with -2

aleksley [76]

Answer:

-105

Step-by-step explanation:

Substituting is like "plug and chug", so we can plug in -2 into the expression and get $(13 - 4(-2))((-2)^2+5(-2)+1)$ , which simplifies into 21*-5, or -105. $\blacksquare$

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4 years ago

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A ball thrown upward and outward from a height of 6 feet. The height of the ball, f(x), in feet can be modelded by f(x)= -0.8x^2

zepelin [54]

A. Convert to vertex form:-

= -0.8(x^2 - 4x) + 6

= -0.8 ((x - 2)^2 - 4)) + 6

= -0.8(x - 2)^2 + 9.2

Maximum height of the ball is 9.2 feet Answer

b. horizontal distance at this height = 2 feet. Answer

c. this distance will be the positive root of f(x) = 0

-0.8(x - 2)^2 = -9.2

(x - 2)^2 = 11.5

xi-2 = sqrt 11.5 = 3.39

required distance = 5.39 = 5.5 feet answer

3 0

4 years ago

Name the intersection of planes ABFE and BFCD.

Mkey [24]

Two planes intersect in a line that contain all common points of these two planes.

1. Plane named ABFE contains points A, B, F and E.

2. Plane named BFCD contains points B, F, C and D.

As you can see points B and F are common points for these two planes, then the line of intersection is BF and its notation is $\overleftrightarrow{BF}.$

Note that notation $\overline{BF}$ stays for segments and notation $\overrightarrow{BF}$ stays for rays.

Answer: correct choice is A.

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3 years ago