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2 years ago

8

Suraji took a slice of pizza from the freezer and put it in the oven. The pizza’s temperature (in degrees Celsius) as a function

of time (in minutes) is graphed. How long was each increase by 4 degrees Celsius?
A. 1/4 minute
B. 1/2 minute
C. 1/3 minute
D. 1 minute

2 answers:

anygoal [31]2 years ago

7 0

Answer:

b.1/2 minute

Step-by-step explanation:

Brilliant_brown [7]2 years ago

3 0

Answer:

b

Step-by-step explanation:

im not sure

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How many x-intercepts does the graph of y = 2x^2 + 5x +9 have?

Pepsi [2]

Answer:

2

Step-by-step explanation:

y = 0 at the point where the function intersects x-axis. Thus, yiou have to put

2x2 + x - 10 = 0

and solve the equation. It is better to factor the quadratic expression, which gives us

2x2 + x - 10 = (2x+5)(x-2) = 0

We have 2x +5 = 0 and x-2 = 0. Thus, the intercepts are x = -5/2 = - 2.5 and x = 2.

Read more on Brainly.com - brainly.com/question/12158546#readmore

7 0

2 years ago

Write an inequality for the shaded region shown in the figure.

Snezhnost [94]

Answer:

y ≥ x^2 - 1

Step-by-step explanation:

First, we can see that the shaded region is above what seems to be a parabola, and we also can see that the lines of the parabola are solid lines (which means that the points on the curve itself are solutions, so the symbol ≥ is used)

Then:

y ≥ a*x^2 + b*x + c

where a*x^2 + b*x + c is the general quadratic equation.

Now let's find the equation for the parabola:

f(x) = a*x^2 + b*x + c

We also can see that the vertex of the parabola is at the point (0, -1)

This means that:

f(0) = -1 = a*0^2 + b*0 + c

= -1 = c

then we have that c = -1

Then:

f(x) = a*x^2 + b*x - 1

Now we can look at the graph again, to see that the zeros of the parabola are at +1 and -1

Which means that:

f(1) = 0 = a*1^2 + b*1 - 1 = a + b - 1

f(-1) = 0 = a*(-1)^2 + b*(-1) - 1 = a - b - 1

Then we got two equations:

a + b - 1 = 0

a - b - 1 = 0

from this we can conclude that b must be zero.

Then:

b = 0

and these equations become:

a - 1 = 0

a - 1 = 0

solving for a, we get:

a = 1

Then the quadratic equation is:

f(x) = 1*x^2 + 0*x - 1

f(x) = x^2 - 1

And the inequality is:

y ≥ x^2 - 1

8 0

3 years ago

Engineers want to design seats in commercial aircraft so that they are wide enough to fit 95%of all males. (Accommodating 100%

Anarel [89]

Answer:

Upper P95 = 16.21in

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

$\mu = 14.4, \sigma = 1.1$

Upper P 95

This is the 95th percentile, which is X when Z has a pvalue of 0.95. So X when Z = 1.645.

Then

$Z = \frac{X - \mu}{\sigma}$

$1.645 = \frac{X - 14.4}{1.1}$

$X - 14.4 = 1.1*1.645$

$X = 16.21$

Upper P95 = 16.21in

3 0

2 years ago

Which of the following are characteristics of the cubic parent function? Select all that apply .

Triss [41]

9514 1404 393

Answer:

B, D

Step-by-step explanation:

The cubic function is plotted in the attachment. It is a curve found in quadrants I and III, so is not symmetric about the y-axis.

Its domain and range are all real numbers, and it passes through the origin.

3 0

2 years ago

Mary Catherine makes 2 gallons of punch how many cups of punch did she make

Tresset [83]

There are 16 cups in the gallon

6 0

3 years ago