3 years ago

Y=2x^2+5 when x=4... Help

Mathematics

1 answer:

balandron [24]3 years ago

7 0

Y=37 is the answer when x=4

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prove that there are real numbers a and b such that square root of a + square root of b equals square root of a + b

Bogdan [553]

Answer:

Lets firts mention that the rule presented in the question does not apply for all real numbers

But, we can see that in some cases it might be true.

Let

a = 1

b = 0

√1 + √0 = 1 + 0 = 1

Likewise,

√(1 + 0) = √(1) = 1

And we see that the result is the same.

8 0

3 years ago

3x - 5y+5=0<br>4x+ 7y+8=0<br><br>Please help

natima [27]

Answer:

Y= -4. X=5

Step-by-step explanation:

This is a simultaneous equation

3x+5y= -5 ------------(1)

4x+5y= -8 ------------(2)

Using elimination method

Eliminate x

×4. 3x+5y= -5

×3. 4x+7y= -8

12x+20y= -20

-(12x+21y= -24) Minus

-y=4 therefore y= -4

Substitute x into equation 1

3x+5(-4)= -5

3x-20= -5

3x= -5+20

3x= 15

x=5

3 0

3 years ago

After the neighborhood block party 2/4 of the brownies were left in the pan. Then Claire ate 1/6 of the leftovers. How much of t

dybincka [34]

Claire at 2/4 of the brownie and 1/6 of the leftover.

3 0

2 years ago

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Darnell’s team scored 40 points at the game. Darnell scored 15% of the team’s points. How many points did Darnell score?

Lina20 [59]

Answer: 6 points

Work:
15/100=0.15
40•0.15=6

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2 years ago

What is 50% 10% 6% 65% as a fraction in simplest form?

tiny-mole [99]

50% - 1/2
10% - 1/10
6% - 3/50
65% - 13/20

3 0

3 years ago