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irina [24]
3 years ago
14

Solve -X^2+7(y+2)-1 x=5 y=-9​

Mathematics
1 answer:
spayn [35]3 years ago
5 0

Answer:

The expression = -75

Step-by-step explanation:

Evaluate: Enter a number for each variable.

−x2+7(y+2)−1

x=

5

y=

-9

Evaluate for x=5,y=−9

−52+7(−9+2)−1

−52+7(−9+2)−1

=−75

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What is the average rate of change of the function over the interval x = 0 to x = 6? f(x) = (2x - 1) / (3x + 5)
Sedaia [141]

Answer:

The average rate of change of the function over the interval x = 0 to x = 6 is \frac{34}{195}.

Step-by-step explanation:

Geometrically speaking, the average rate of change (r) of the function over a given interval is determined by equation of secant line, that is:

r = \frac{f(b)-f(a)}{b-a} (1)

Where:

a, b - Lower and upper bounds.

f(a), f(b) - Function evaluated at lower and upper bounds.

If we know that f(x) = \frac{2\cdot x -1 }{3\cdot x + 5}, a = 0 and b = 6, then the average rate of change of the function over the interval is:

f(a) = \frac{2\cdot (0)-1}{3\cdot (0) +5}

f(a) = -\frac{1}{5}

f(b) = \frac{2\cdot (6)-1}{3\cdot (6)+5}

f(b) = \frac{11}{13}

r = \frac{\frac{11}{13}-\left(-\frac{1}{5} \right) }{6-0}

r = \frac{34}{195}

The average rate of change of the function over the interval x = 0 to x = 6 is \frac{34}{195}.

5 0
3 years ago
A coffee dispensary uses ⅘ of a barrel of coffee beans per batch of coffee they ship. Yesterday, the dispensary used 3 ⅕ of a ba
KengaRu [80]

Answer:

4 batches

Step-by-step explanation:

First, you need to convert the mix number into a single fraction:

3 1/5 = 16/5 total barrels of coffee beans used

This allows us to divide the numbers easier in the next step.

Next, because each batch uses 4/5 of a barrel of beans, you need to divide 16/5 by 4/5:

(16/5) / (4/5) = 16/4 = 4 batches

(The fives cancel out because they are the same divisor.)

I hope this helps!

-TheBusinessMan

4 0
4 years ago
The one that said there should be a choose number of trial. the answer chose are greater or lesser
Alexeev081 [22]

Answer:

The first option is greater. The second option is more. The third option is 50%.

Step-by-step explanation:

Flipping a coin heads or tails expected probability is 50%. The more trials there are, the more accurate the actual probability will be.

Hope this helps!

6 0
3 years ago
Alma got to the playground at 2:45.she spent 20 minutes on the swings and 10 minutes on the jungle gym. She played on the slide
Archy [21]

Answer:

Alma got home at 3:27

Step-by-step explanation:

2:45+30 min=3:15

3:15+12 min = 3:27

3 0
3 years ago
Jade and Ali set the alarms on their phones to sound at 7.15 am.
Kitty [74]

Answer:

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Step-by-step explanation:

Alarms sound at 7:15 am

Alarm frequencies are 40 min and 60 min

Since 40= 20*2 and 60= 20*3, the overlapping frequency is:

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So next time both alarms sound at 7:15 am + 2 hours = 9:15 am

5 0
4 years ago
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