2 years ago

(y-7)^2=2y^2-4y+73 solve for y

Mathematics

1 answer:

masya89 [10]2 years ago

7 0

Answer:

y=-4 or y=-6

Step-by-step explanation:

y^2-14y+49=2y^2-4y+73

y^2+10y+24=0

(y+4)(y+6)=0

y=-4 or y=-6

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a certain triangle has a perimeter of 3067 mi. the shortest side measures 71 mi less than the middle side and the longest side m

UkoKoshka [18]

Answer:

The measure of the shortest side is 851 miles

Step-by-step explanation:

Let

x ----> the measure of the shortest side

y ---> the measure of the middle side

z ---> the measure of the longest side

we know that

The perimeter of triangle is equal to

$P=x+y+z$

$P=3,067\ mi$

$3,067=x+y+z$ ----> equation A

the shortest side measures 71 mi less than the middle side

$x=y-71$ ----> equation B

the longest side measures 372 mi more the the middle side

$z=y+372$ ----> equation C

substitute equation B and equation C in equation A

$3,067=(y-71)+y+(y+372)$

solve for y

$3,067=3y+301\\3y=2,766\\y=922$

Find the value of x

$x=y-71\\x=922-71\\x=851$

therefore

The measure of the shortest side is 851 miles

6 0

3 years ago

Divide 254 by 11.8. Round your answer to the nearest hundredth. A. 20.97 B. 21.53 C. 21.35 D. 22.07

Rainbow [258]

The answer is B 21.53

7 0

3 years ago

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There is a bag filled with 4 blue and 5 red marbles. A marble is taken at random from the bag, the colour is noted and then it i

Vera_Pavlovna [14]

Answer:

2/9?

Explanation:

4+5=9

5>4

2x chance

8 0

3 years ago

I need help!!!

BaLLatris [955]

(1) -6 x + 8 x = -46 Answer = -23

(2) w + 3/4 = w - 2/2 Answer = {}

(3) 2 x + 16 = 3(x - 9) Answer = 43

(4) Answer D)

(5) -3 x + 4 = -8 Answer x = 4

(6) C)

(7) B)

(8) C)

(9) x + 3/5=2 Answer x = 7/5

(10) 4 - 2 x = 10 Answer x= = -3

If something is wrong apologize, I hope it helps.

6 0

3 years ago

Solve the inequality n+3<-7

Aliun [14]

Answer:

Step-by-step explanation:

n<-7-3

n<-10

=> n= (-infinitive ; -10)

5 0

2 years ago