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2 years ago

If DM 5 37, find the value of r.A) 7B) 15C) 17D) 18

Mathematics

1 answer:

djyliett [7]2 years ago

4 0

Answer:

its C

Step-by-step explanation:

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Kevin is 3 times as old as Daniel. 4 years ago, Kevin was 5 times as old as Daniel.

DochEvi [55]

X is Kevin; Y is Dan

X = 3Y

X - 4 = 5(Y - 4)

3Y - 4 = 5(Y - 4)
3Y - 4 = 5Y - 20
   + 4 +4
4 cancels each other out.
3Y = 5Y - 16
   - 5 -5
5 cancels each other out.
-2Y = -16
/2 /2
   Y = 8

X = 3Y;
X = 3 x 8;

Thus,
X = 24;
Kevin(x) is 24

8 0

3 years ago

I really need help I would appreciate it if someone could help me

sleet_krkn [62]

Answer:

a) The vertex of the graph is $(h,k) = (0, 31)$ , b) $a = -16$ , c) The equation of the parabola is $f(t) = -16\cdot t^{2}+31$ .

Step-by-step explanation:

a) The tennis ball experiments a free fall, that is, an uniform accelerated motion due to gravity and in which effects from Earth's rotation and air viscocity are negligible. The height of the ball in time is represented by a second order polynomial. Hence, the vertex of the parabola is the initial point highlighted in graph.

The vertex of the graph is $(h,k) = (0, 31)$ .

b) If we know that $(h,k) = (0, 31)$ , $f(t) = a\cdot (t-h)^{2} + k$ and $(t,f(t)) = (1,15)$ , then the value of $a$ is:

$f(t) = a\cdot (t-h)^{2} + k$

$15 = a\cdot (1-0)^{2}+31$

$15 = a\cdot 1 + 31$

$a = 15-31$

$a = -16$

c) The equation of the parabola is $f(t) = -16\cdot t^{2}+31$ .

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3 years ago

Ken is doing a layout for a new book. He has a drawing that is 12 centimeters by 10 centimeters, but the maximum space available

Temka [501]

2:3
Ratio problem

8:12 = 2:3

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3 years ago

Please explain step by step on how you got the answer.

Jobisdone [24]

The answer is 21

First you po perenthies which would be 8-6=2 the equation now is 5+4×(2)2

Then you to exponents which would be 2×2=4 the equation now is 5+4×4

Now you multiply 4×4=16 the equation is now 5+16

Now you add 5 and 16 to get 21

7 0

3 years ago

Which of the following is likely to have the greatest variability? *

noname [10]

Answer:

Step-by-step explanation:

4 0

2 years ago

If DM 5 37, find the value of r.A) 7B) 15C) 17D) 18​

If DM 5 37, find the value of r.A) 7B) 15C) 17D) 18