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Damm [24]
3 years ago
6

Find the value of f(4) for the function

Mathematics
1 answer:
cluponka [151]3 years ago
8 0

Answer:

f(4) = 7

Step-by-step explanation:

The notation for these type of problems is very confusing. Just remember that f(x) is the same thing as y (or some variable). Even if there is a number or something on the inside of the parentheses, it's still just a variable.

In our case

f(a) = 2(a + 4) -9

could be rewritten as

y = 2(a + 4) - 9

the thing on the inside of the parentheses signifies what the equation is dependent on.

so when is says f(4), it just want's you to trade out a for a 4, but the equation is still the same.

f(4) = 2((4) + 4) - 9

Now, just follow the order of operations

f(4) = 2(8) - 9

f(4) = 16 - 9

f(4) = 7

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The answer is:  [C]:  " 125 mL " .
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Explanation:
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Volume of cube = 5 cm * 5 cm * 5 cm =  5³ cm³ ;

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              1 cm³ = 1 mL (exact conversion) ;  so, 125 cm³  =  125 mL  ;
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5 0
3 years ago
A ladder is leaning against the side of a building. The
cupoosta [38]

Answer:

16 ft

Step-by-step explanation:

Based on the situation above, it forms into a right triangle. Therefore we can apply the Pythagorean Theorem. We will use the formula below:

c = √( a² + b²)

In the problem above, the ladder acts as the hypotenuse denoted by c. It has a length of 20 ft. While the base denoted by b is 12 ft. Therefore, we need to solve for a. We will derive the formula above.

c² = a² + b²

a² = c² - b²

a = √( c² - b² )

a = √( 20² - 12² )

a = 16

The unit is in ft.

Correct me if I'm wrong. I hope it helps.

8 0
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A new phone costs $450. There is a 40% discount on the price of the phone and an 8% sales tax on the discount price. What is the
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A number is at most seven. Which of the following inequalities represents this statement? n > 7 n ≥ 7 n < 7 n ≤ 7
Katena32 [7]
N is less than or equal to 7 (last option)
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3 years ago
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How about identify witch stamt is true A. -2.6>2.521 B.-0.4>-0.004 C.-8.0329>-8.045 D.-36.5>-36.07
astra-53 [7]
<span>A. -2.6 > 2.521 false
B.-0.4 > -0.004  false
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D.-36.5 > -36.07 false

answer

</span>C.-8.0329 > -8.045 
5 0
4 years ago
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