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disa [49]
2 years ago
8

If f(x) = x^2+ 3x + 5 what is f(3+h)?

Mathematics
1 answer:
nika2105 [10]2 years ago
5 0

Answer: 23+9h+h^2

Step-by-step explanation:

f(3+h)=(3+h)^2+3(3+h)+5=

= 3^2+2*3*h+h^2+3*3+3*h+5=

= 9+6h+h^2+9+3h+5=

= 23+9h+h^2

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London has a collection of 260 coins. How many coins represent 25% of her collection?
Sergeu [11.5K]

Answer:

65 coins

Step-by-step explanation:

Set this problem up with a porportion.

\frac{?}{260} \frac{25}{100}

After that, cross multiple and divide.

25 times 260. Then divide by 100. That is then your answer.

8 0
2 years ago
I need help answering number 8 please
swat32
The diagram of the triangle is shown below

One interior angle is 56° 
One exterior angle is 103° ⇒ we can work out one interior angle 180°-103° = 77°

The other interior angle is 180° - (56°+77°) = 44°

5 0
3 years ago
Write a point-slope equation for the line that passes through the point (1, 6) and is parallel to the line given by y = 5x + 25.
jeka94
Y=mx+c
Parallel=> m=5
Y=5x+c
Sub (1,6)
6=5+c
=> c=1
=> equation is y=5x+1
8 0
3 years ago
Find a formula for the described function. an open rectangular box with volume 9 m3 has a square base. express the surface area
Maru [420]

Let

x--------> the length side of the square base

h--------> the height of the box

we know that

<u>the volume of the box is equal to</u>

V=x^{2} *h\\ V=9\ m^{3}

so

x^{2} *h=9\\\\h=\frac{9}{x^{2} }

<u>the surface area of the box is equal to</u>

SA=area\ of\ the\ base+perimeter\ of\ base*height (remember that the box is open)

area of the base=(x^{2})\ m^{2}

Perimeter of the base=(4*x)\ m

height=(h) m

h=\frac{9}{x^{2}}

substitute

SA=x^{2} +4*x*h\\ \\ \\ SA=x^{2} +4*x*\frac{9}{x^{2} } \\ \\ SA=x^{2} +\frac{36}{x}

we know that

the value of x can not be negative and the denominator can not be zero

therefore

<u>the answer is</u>

the domain of  SA is x> 0

the domain is the interval-------------> (0,∞)

6 0
2 years ago
Look at the triangle:
lutik1710 [3]

Answer:

15/17

Step-by-step explanation:

You can calculate cosine by doing adjacent / hypotenuse so cos x° = 15/17.

7 0
2 years ago
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