What is the answer to this?

Mathematics

2 answers:

nekit [7.7K]2 years ago

7 0

Answer:

Step-by-step explanation:

Y= 1x^2 + 3x + 9

Y= Ax^2 + Bx + C

To determine which way a parabola opens just look at the coefficient (the number) of the x^2 - Always use the coefficient that is beside the x^2

So, if the coefficient A is positive the parabola is opening upward

if the coefficient A is negative the parabola is opening downward

Fofino [41]2 years ago

6 0

How??

To determine whether a parabola graph will go up or down we need to see the coefficient of x² in the quadratic equation.
If the coefficient is positive then graph will go up and if the coefficient is negative then the graph will go down..

In our case, The coefficient of x² is +1, so the parabola will open in the upward direction.

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How many 3/4 pound bags of sugar can be filled with 36 lb of sugar?

ser-zykov [4K]

Answer:

48 bags

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

1. (Sec. 6.1) In a random sample of 80 components of a certain type, 12 are found to be defective. (a) Give a point estimate for

denis-greek [22]

Answer:

(a) 0.85

(b) 0.7225

Step-by-step explanation:

(a) The point estimate for the proportion of all such components that are not defective is given by the number of non-defective units in the sample divided by the sample size:

$p=\frac{80-12}{80}\\p=0.85$

The proportion is 0.85.

(b) Assuming that the sample is large enough to accurately provide a point estimate for the whole population, this can be treated as a binomial model with probability of success (non-defective part) p = 0.85. Since both components must be non-defective for the system to work, the probability of two successes in two trials is:

$P(x=2) = 0.85^2\\P(x=2) = 0.7225$