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Ostrovityanka [42]
4 years ago
13

Can someone help please?!

Mathematics
2 answers:
lukranit [14]4 years ago
8 0
What 2 numbers muliply to get -30 and add to get 7?
-3 and 10

(x-3)(x+10) is da answer

C is answer
Minchanka [31]4 years ago
4 0
X² + 7x - 30
x² + 10x -3x - 30
x(x+10) - 3(x+10)
(x-3)(x+10)

Answer is C
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Complete the general form equation of the parabola that passes through (4, -11) with vertex at : (2, -3).
fomenos

Answer:

Step-by-step explanation:

You're given a coordinate in the form of (x, y) and you're also given the vertex in the form of (h, k). We will use those in the vertex form of the equation

y=a(x-h)^2+k and solve for a. Filling in:

-11=a(4-2)^2-3 which simplifies a bit to

-11=a(2)^2-3 and a bit more to

-11=4a-3. Add 3 to both sides to get

-8 = 4a so

a = -2

The equation, then, is

y=-2(x-2)^2-3

7 0
3 years ago
Q2
dexar [7]

Answer:

The interval [25, 35] has the slowest average rate of decay.

Step-by-step explanation:

The number of grams in a sample of radium is represented by the function r(t) = 50\cdot e^{-0.013\cdot t}, which is a monotonous decreasing function. Hence, the greater the values of t, the slowest the average rate of decay, represented by a secant line. The interval [25, 35] has the slowest average rate of decay.

8 0
3 years ago
Kia wrote the number 85 on the board.is 85 a prime or composite number ? EXPLAIN
Andrei [34K]

Answer:

Prime

Step-by-step explanation:

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3 years ago
What i do wrong<br> ?????
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Try to just put 10 or =10
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