Ask question

Ask question

All categories

erma4kov [3.2K]

4 years ago

8

Please help anyone.

1 answer:

Burka [1]4 years ago

7 0

Answer:

- $\frac{27}{7}$

Step-by-step explanation:

Given

f(x) = $\frac{3}{x+2}$ - $\sqrt{x-3}$

Evaluate f(19) by substituting x = 19 into f(x)

f(19) = $\frac{3}{19+2}$ - $\sqrt{19-3}$

= $\frac{3}{21}$ - $\sqrt{16}$

= $\frac{1}{7}$ - 4

= $\frac{1}{7}$ - $\frac{28}{7}$ = - $\frac{27}{7}$

You might be interested in

Determine f(a+h)-f(a)/h for f(x)=x^2+5x

Crank

Answer:

2x + 5

ok.. slightly silly question...

you will eventually learn that this formula is the

formula for the "derivative" in calculus....

A $x^{b}$ becomes (a*b) $x^{b-1}$

2x + 5

Step-by-step explanation:

4 0

3 years ago

Which values are solutions of the inequality 5 < y -8<br><br>8 , 9. , 13. , 15. , 20

Sladkaya [172]

Answer:

5 is greater than y-8 since 5 is positive it + in the begging +5 while - 8 is less than 0 because it has - in the begging

6 0

3 years ago

It is 18°C at 8 am, and 14°C by noon. The change in temperature from 8 am to noon is

Mashcka [7]

The answer to the question is B.

6 0

3 years ago

15 points for someone who can answer & explain this to me thanks

iris [78.8K]

Answer:

see explanation

Step-by-step explanation:

Given

$\frac{9}{a^2+9a+20}$ , $\frac{7a}{a^2+11a+28}$

Factor the denominators of both fractions

$\frac{9}{(a+4)(a+5)}$ , $\frac{7a}{(a+4)(a+7)}$

The lowest common denominator of both fractions is (a + 4)(a + 5)(a + 7)

Multiply numerator/denominator of first fraction by (a + 7)

Multiply numerator/denominator of second fraction by (a + 5 )

$\frac{9(a+7)}{(a+4)(a+5)(a+7)}$ , $\frac{7a(a+5)}{(a+4)(a+5)(a+7)}$ , then

$\frac{9a+63}{(a+4)(a+5)(a+7)}$ , $\frac{7a^2+35a}{(a+4)(a+5)(a+7)}$

8 0

3 years ago

What is the standard form of the line with x-intercept of 6 and y-intercept of 5?

Vanyuwa [196]

Answer:

It should be 5x-6y=30

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers