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3 years ago

Rationalize the denominator and simplify. √a+1 - 2 / √a+1 + 2

Mathematics

1 answer:

goldfiish [28.3K]3 years ago

3 0

Answer:

5+a-4√a+1 / a-3

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Solve the equation show you work and check. Your answer 4y+5=31

taurus [48]

31-5=26
26/4=6.5
Y=6.5

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3 years ago

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Find all numbers whose absolute value is 6.

posledela

Answer:

6 and -6

Absolute value mans the distance a number is away from 0.

4 0

3 years ago

Which graph represents f(x)=−2cos(4πx)?

algol [13]

Answer:

the last one (bottom right)

Step-by-step explanation:

4×pi is the same as twice around the whole circle to the beginning. it is the same as 0°, and cos(0) = 1, and then -2×cos(0) = -2

so, we only need to look, where the function reaches -2.

it should be at x = 0, x = 0.5 and x = 1.

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2 years ago

Which statement is not true <br> 3+4+5=4+3+5<br> (6-3)=4+(6-3)<br> 6+6-3=6-6+3

Mandarinka [93]

Answer:

The second one is not true the left side 3 does not equal the left side 7, which means it is not true.

The third one is also not true because the left side 9 does not equal the left side 3, which also means it is not a true statement

Step-by-step explanation:

8 0

3 years ago

2. in a class of 50 students, the number of females is 2 more than 5 times the number of males. How many males and females are t

Ber [7]

Answer:

There are 8 males in the class and 42 females.

Step-by-step explanation:

This question can be solved using a system of equations.

I am going to say that:

x is the number of females.

y is the number of males.

Class of 50 students

This means that $x + y = 50$

The number of females is 2 more than 5 times the number of males.

This means that $x = 5y + 2$

So, finding y, the number of males:

$x + y = 50$

$5y + 2 + y = 50$

$6y = 48$

$y = \frac{48}{6}$

$y = 8$

Females:

$x = 5y + 2 = 5*8 + 2 = 42$

There are 8 males in the class and 42 females.

7 0

2 years ago