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Lelu [443]
3 years ago
11

Which expression is equivalent to 210 d^2-63 d

Mathematics
1 answer:
Rina8888 [55]3 years ago
3 0

Step-by-step explanation:

_______________________

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I need help on this one and the one at the bottom
KiRa [710]
The last awnser is 15x + 2 and the first one is explained below:
 65 X 1.5 = 97.5
97.5 + 95 = 192.5 
     192.5 is awnser 
If you want me to explain in more detail comment on my user i will check my notifications and help you out !!! :D 
PEACE YALL

3 0
4 years ago
A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by th
oksian1 [2.3K]

Answer:

17 seconds

Step-by-step explanation:

Solution:-

The trajectory of a rocket launched is modeled by a parabolic path via a quadratic equation as follows:

                               y = -16x^2 + 266x +102

Where,

                   y: The height of the rocket from ground

                   x: The time taken since rocket launch

We are to determine the time ( x ) it takes for the rocket to hit the ground. This can be determined by setting the quantity ( y ) to zero as follows

                             y = -16x^2 + 266x +102 = 0\\\\ -16x^2 + 266x +102 = 0

solve the quadratic equation using quadratic formula as follows:

                             x = \frac{-b +/- \sqrt{b^2 - 4ac} }{2a} \\\\x = \frac{-266 +/- \sqrt{266^2 - 4*(-16)*(102)} }{2*(-16)} \\\\x = \frac{-266 +/- 278 }{-32} \\\\x = 8.3125 +/- 8.6875\\\\x = 17 , -0.375

Answer: Ignore the negative value for time " -0.375 ". Hence, the rocket hits the ground at time t = 17 seconds

6 0
3 years ago
WILL GIVE BRAINIEST. Tony drives 18 miles to pick up his friend at his house. Then he drives at a constant speed of 40 miles per
prohojiy [21]

Answer:

A. C.

Step-by-step explanation:

A is right because you would use y as miles and x as time multiplied by 40 the constant and then plus 18 for the previous miles. C is right because 18 is the initial value with 18 being added

5 0
4 years ago
Find the slope of the line through the given points<br> (21,-7)and (-7,1)
Alex Ar [27]

answer

m= -2

7

explanation

5 0
3 years ago
Will Mark brainliest if correct. Will report if not correct.
Ksju [112]

Answer:

Looks like the scale factor is 1/3.

Step-by-step explanation:

<em>(In this dilation, the green image is polygon ABCDE, and the red image is polygon A'B'C'D'E'. The red image is the resulting image after said dilation.)</em>

A scale factor greater than one enlarges an image, and a scale factor between zero and one shrinks an image, so that rules out options 2 (SF = -3) and 3 (SF = 3).

A negative scale factor would end up in an image opposite the center of enlargement, so that eliminates option 4 (SF = -1/3).

So that means that the scale factor is option 1 (SF = 1/3)!

6 0
3 years ago
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