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Goryan [66]
3 years ago
5

How to do it i don’t understand it

Mathematics
1 answer:
Sphinxa [80]3 years ago
3 0

When we are given a function f(x) and we are asked for f(a) [a is any number], it means to replace (or substitute) a into x in the function (x=a)

In this problem, we are asked to replace x with 2 in f(x), the first equation, and replace x with 3 in the second equation.

It looks like this:

f(2) = 2^3 + 5(2)^2 = 8 + 5(4) = 8 + 20 = 28

g(3) = 2(3) + 4 = 6 + 4 = 10

We finally just add these two numbers from f(2) and g(3) and get 28 + 10 = 38

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7nadin3 [17]

Answer:

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Step-by-step explanation:

6 0
2 years ago
0.6w = 0.48 how u do this
vovangra [49]

A variable next to any number means to multiply, so we would do the inverse operation -- We would divide 0.48 by 0.6, which is 0.8. Therefore, W=0.48. To check your work, multiply 0.6 by 0.8, and what do you know? It's 0.48! :)
3 0
2 years ago
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Nishi invests £3200 at 6% interest per year. Work out how much she will have altogether after: 2 years ​
artcher [175]

SI = P×R×T/100

(3200×6×2)/100

= 384

Now 3200 + 384

= Euro 3584

4 0
2 years ago
The function, f(x)=70n-400, models the profit of the instructor of a guitar class per month, where n is the number of students e
zimovet [89]

profit=f(x)

so solve for f(x)=1000

1000=70n-400

add 400 to both sides

1400=70n

divide both sides by 70

20=n

20 students need to be enrolled to make a profit of 1000.00

4 0
2 years ago
Is a triangle with sides of length 6ft, 21 ft, 23 ft. A right triangle?
gayaneshka [121]

Answer:

No

Step-by-step explanation:

By using the Pythagoras theorem, it can be easily determined that whether the triangle is right triangle or not.

Thus, a^{2}+b^{2}=c^{2} where where a and b are the legs and c is the hypotenuse.

Let a=6ft, b=21ft and c=23ft, then

a^{2}+b^{2}=c^{2}

(6)^{2}+(21)^{2}=(23)^{2}

36+441=(23)^{2}

477=529

which is not possible, therefore the given triangle is not right triangle because it does not satisfy the Pythagoras theorem.


7 0
2 years ago
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