2 years ago

Corey is 12 years older than Donovan. Five years ago the sum of their age was 28. How old are they now?

Mathematics

1 answer:

larisa [96]2 years ago

4 0

Answer:

Step-by-step explanation:

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Use the quadratic formula to solve 2x^2=5x+6. Leave your answer in radical form. Show all of your work!

Westkost [7]

Answer:

In radical from 169/50 , 177/200

Step-by-step explanation:

Given:

$2x^2=5x+6\\\\2x^2-5x-6=0\\\\Where, a=2 , b=-5 , c=-6$

Find:

Value of $x$

Computation:

Using quadratic formula:

$\frac{-b\±\sqrt{b^2-4ac} }{2a}\\\\By\ putting\ all\ value\\\\ \frac{-(-5)\±\sqrt{(-5)^2-4(2)(-6)} }{2(2)}\\\\ \frac{5\±\sqrt{25+48} }{4}\\\\ \frac{5\±8.54 }{4}\\\\\frac{5+8.54 }{4},\frac{5-8.54 }{4} \\\\3.38 , 0.885$

Value of $x$ 3.38 , 0.885

In radical from 169/50 , 177/200

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2 years ago

A motorboat takes 3 hours to travel 108 going upstream. The return trip takes 2 hours going downstream. What is the rate of the

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Let s and c be the rate of the boat in still water and the rate of the current, respectively. Then:
108/s-c=3
108/s+c=2
3s-3c=108
2s+2c=108
Solve for s and c
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2 years ago

big game world is having a sale on video games this store is offering a sale pack of 4 video game for 43dollars and 80 cents wha

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4 x U(unit price) = $43.80

U = 43.80 / 4

U = 10.95$

7 x 10.95 = 76.65$

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2 years ago

Help please.. sorry for my dirty screen I don’t feel like cleaning it

Brums [2.3K]

Answer:

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1 year ago

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Can someone please help me asap I’ll mark brainlist + extra points!!!

lana [24]

Step-by-step explanation:

2) radius = 7

diameter = 14

A = 49π or 153.94

C = 14π = 43.98

3. radius = 9

diameter = 18

area = 81π or254.47

C = 18π = 56.55

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2 years ago