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miskamm [114]
3 years ago
12

I NEED HELP ASAP PLEASE

Mathematics
1 answer:
skad [1K]3 years ago
5 0
A^2+b^2=c^2 so c^2=12^2+16^2 which then simplifies to c^2=144+256 then simplify that to c^2=400. After that take the square root of c^2 and the square root of 400. So your answer is c=20
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Andy joins a social networking site. After day three, he has 25 friends; after day eight, he has 40 friends. Write the equation
Allisa [31]

Answer:

Point slope intercept form: The equation for line is given by; y-y_1=m(x-x_1) ......[1] ; where m is the slope and a point (x_1, y_1) on the line.

Let x represents the number of days and y represents the number of friends.

As per the statement:  After day three, he has 25 friends; after day eight, he has 40 friends.

⇒ We have two points i.e,

(3, 25) and (8, 40)

First calculate slope(m);

m = \frac{y_2-y_1}{x_2-x_1}

Substitute the given values we get;

m = \frac{40-25}{8-3}=\frac{15}{5} = 3

now, substitute the given values of m=3 and a point (3, 25) in [1] we get;

y-25=3(x-3)

Using distributive property; a \cdot(b+c) = a\cdot b + a\cdot c

y-25 = 3x - 9

Add 25 on both sides, we get;

y-25+25 = 3x - 9+25

Simplify:

y =3x + 16

if  x = 18 days, then;

y = 3(18) + 16 = 54+16 = 70

Therefore, he will have on day 18, if he continues to add the same number of friends each day is, 70 friends.

7 0
3 years ago
plzzzzzzzzzzzzzzzzz i need help nowwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww
Andre45 [30]

Answer:

D.

Step-by-step explanation:

So find what two numbers multiply to 72 and add up to 17

9 and 8

(z + 9)(z + 8)

4 0
3 years ago
Read 2 more answers
HELP YOU WILL GET BRAINLIEST
dezoksy [38]

Answer:

60π

Step-by-step explanation:

2π(3 × 7 ) + 2π (3)^2

Distribute: 2x3x7 and 2x3^2

42π + 18π

That gives 60π.

7 0
3 years ago
Use the Pythagorean Theorem to find the missing length and then round the result to the nearest tenth.
motikmotik
A^2+B^3=c^2
6^2+8^2=c^2
36+16=c^2
52=c^2
Square root both sides
7.2=C
6 0
3 years ago
9x +y=-5<br> Coefficient of x
V125BC [204]

Answer:

x=-14y

Step-by-step explanation:

9x+y=-5

x+y=-5-9

x+y=-14

x=-14y

8 0
3 years ago
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