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Lelechka [254]
2 years ago
10

Help pls plsssssssss

Mathematics
1 answer:
Salsk061 [2.6K]2 years ago
4 0

Answer:

area = 0.5 \times height \times width \\  = 0.5 \times (x + 2) \times (x +2  - 7) = 4 \\ 4  \div 0.5 = (x + 2)(x - 5) = 8 \\  {x}^{2}  - 3x - 10 = 8 \\  {x}^{2}  - 3x - 18 = 0 \\ (x - 6)(x  + 3) = 0 \\ x =  - 3 \\ x = 6

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What are the zero(s) of the function f(x)=<img src="https://tex.z-dn.net/?f=%5Cfrac%7B4x%5E%7B2%7D-36x%20%7D%7Bx-9%7D" id="TexFo
Contact [7]

Answer:

D

Step-by-step explanation:

The function will be zero when the numerator is equal to 0. So, set the numerator equal to 0 and solve:

0 = 4 {x}^{2}  - 36x

I will use the quadratic formula:

\frac{ 36  +  \sqrt{ {36}^{2}  - 4(4)(0)} }{2(4)}  \\  \frac{  36 + 36}{8}  = 9

Therefore, x = 9 is a 0. Let's check with subtracted root now:

\frac{ 36   -    \sqrt{ {36}^{2}  - 4(4)(0)} }{2(4)}  \\  \frac{ 36  -  36}{8}  =  0

It appears 0 is also a root.

Therefore, the answer is D.

7 0
3 years ago
The product 3/4 times 1/2 will be less than or greater than 3/4
Komok [63]

Answer:

less

Step-by-step explanation:

first you would multiply and get 4/8, which simplifies to 1/2, which would be 2/4, which is less than 3/4

3 0
3 years ago
Read 2 more answers
John's car is stopped at a red light. When the light changes, the car accelerates to 45 miles per hour in 15 seconds. What is th
Ede4ka [16]
Initial velocity of John's car (V1) = 0 miles per hour
Final velocity of John's car (V2) = 45 miles per hour
Time taken for acceleration = 45 seconds
Then
Acceleration = (V2 - V1)/Time taken
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                     = 45/15 miles per hour per second
                     = 3 miles per hour per second.
So the approximate rate of change in the miles per hour that John's car accelerated is 3 miles per hour per second. The correct option among all the options given in the question is option "A".

5 0
3 years ago
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I have five questions and I need some help. please help
Step2247 [10]
The answer to the question

5 0
3 years ago
The equation y=x^3 + 3 is symmetric with respect to which of he following?
lianna [129]

y = x^{3} +3

Subtract 3 from both sides,

y-3=x^{3}

Let x = X and y - 3 = Y

Then,

Y = X^{3}

So, we have shifted the origin to a point (0, 3).

This is an odd function and the graph of an odd function is symmetrical about the origin.

That is, symmetrical about X = 0, Y = 0

Symmetrical about x = 0,, y - 3 = 0

Symmetrical about x = 0, y = 3.

Hence, the graph is symmetrical about the point (0, 3).

3 0
3 years ago
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