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3 years ago

PLEASE HELP 100 POINTS!

Mathematics

2 answers:

Leya [2.2K]3 years ago

7 0

Answer: 54 alligators and 146 turtles

Step-by-step explanation: You get 4x-16=200. Add 16 on each side then divide by 4

podryga [215]3 years ago

6 0

Answer:

72 alligators, 128 turtles

Step-by-step explanation: When you put the words into the form of an equation, with a being alligators, you get

3a-16=200

So you have to do 'letters left numbers right'. This gives you

3a=216

Now you have to divide. 216 divided by 3 equals 72. So there are 72 alligators. 200 minus 72 equals 128, so there are 128 turtles

hope i help

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If x2=18x+y and y2=18y+x, then find the value of root

mezya [45]

Answer:

$\sqrt{x^2+y^2+1}=18$

Step-by-step explanation:

We are given:

$x^2=18x+y\qquad\qquad[1]$

$y^2=18y+x\qquad\qquad[2]$

Subtracting [1] and [2]:

$x^2-y^2=18x+y-(18y+x)$

Operating:

$x^2-y^2=18x+y-18y-x$

Recall:

$x^2-y^2=(x-y)(x+y)$

Substituting:

$(x-y)(x+y)=18x+y-18y-x$

Rearranging:

$(x-y)(x+y)=18x-18y-(x-y)$

$(x-y)(x+y)=18(x-y)-(x-y)$

Dividing by x-y (recall x≠y):

$x+y=18-1=17$

$x+y=17\qquad[3]$

Now we add [1] and [2]:

$x^2+y^2=18x+y+18y+x$

Rearranging:

$x^2+y^2=18x+18y+x+y$

$x^2+y^2=18(x+y)+(x+y)$

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Substituting from [3]

$x^2+y^2=19*17=323$

Adding 1:

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$\mathbf{\sqrt{x^2+y^2+1}=18}$

3 0

3 years ago

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Murljashka [212]

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3 years ago

Read 2 more answers

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Sidana [21]

Y -:5 = 2/3x + 6 because 6 is 2/3 of 9
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y = 2/3x + 11
the y intersept is 11 or (0 , 11) when x is 0
when x is 3
y = 2/3 (3) + 11 or 2 + 11 = 13
so a 2nd point could be (3 , 13)

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3 years ago

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4 years ago