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kramer
3 years ago
8

Over which interval is the graph of fx =-x2 + 3x + 8 increasing

Mathematics
1 answer:
Semenov [28]3 years ago
8 0

Answer:

Step-by-step explanation:

it is increasing in ]-\infty;3/2]

because this is like

f(x)=ax^2+bx+c

where a > 0

and -b/a=3/2

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Jack left his house and drove at 60 km/h for 5 hours to reach Spencer's house.
Aleks04 [339]

Answer:

6hrs

Step-by-step explanation:

60km x 5 = 300km distance

50km x 6 = 300km distance

7 0
4 years ago
a cinder block is sitting on a platform 20 high. lt weighs 79n. The block has_____ energy. calculate it.
Leni [432]
A cinder block is sitting on a platform 20 m high. It weighs 79 N. The block has Gravitational Potential Energy.

Calculations:
Ep = mgh = mg = Fg
Ep = (Fg)(h)
Ep = (79N)(20 m)
Ep = 1580 J.

I believe the block's potential energy with respect to gravity is 1580 J.
3 0
3 years ago
Todd begins piano practice ar 4:15 p.m. and ends at 5:50 p.m. How long does he practice
kumpel [21]
He practiced for 1 hour and 30 minutes
4 0
4 years ago
Read 2 more answers
Find the sum. 13(9−6m)+14(12m−8)
FinnZ [79.3K]
To do this problem, we must first distribute the 13 and 14 into the parenthesis.

<span>13(9−6m)+14(12m−8)

117 - 78m + 168m - 112

To combine like terms, we can add/subtract terms that have an "m" together and then we can add/subtract terms that do not have "m" together.

117 - 112 = 5
and 
168m - 78m = 90m

So our final sum is 5 + 90m</span>
7 0
3 years ago
Read 2 more answers
A box contains 14 large marbles and 10 small marbles. Each marble is either green or white 8 of the large marbles are green, and
netineya [11]

The probability that the marble is large or white is 0.5714.

<h3>What is probability?</h3>

Probability is the branch of mathematics that studies the possible outcomes of given events together with the outcomes' relative likelihoods and distributions.

Probability of an event is

P(A) = Number of favorable outcomes/ Total Number of outcomes      

       = n(A)/n(S)

where

P(A) is the probability of an event “A”

n(A) is the number of favorable outcomes

n(S) is the total number of events in the sample space.

We have,

Number of large marbles = 14

Number of small marbles = 10

Number of large green marbles = 8 which implies

Number of large white marbles = 14 - 8 = 6

Number of small white marbles = 4 which implies

Number of small green marbles = 10 - 4 = 6.

Now, let

Let X be the event of drawing large marble.

Let Y be the event of drawing small marble.

Let M be the event of drawing white marbles.

Let N be the event of drawing green marbles.

Since only one marble is drawn at a time ,

so P(X) =  14/24

    P(Y) = 10/24

    P(M) = 10/24

    P(N) = 14/24

We have to find the probability that a marble is large or white i.e. P(X∪M).

P(X∪M) = P(X) + P(Y) - P(X∩M)

P(X∩M) = In 14 large marbles 6 are white marbles = 6/14.

P(X∪M) = P(X) + P(Y) - P(X∩M) = 14/24 + 10/24 - 6/14 = 0.5833+0.4167-0.4286 = 0.5714.

Therefore, the probability of drawing large or white marble is 0.5714.

To know more about probability, visit

brainly.com/question/19169117

#SPJ4

3 0
1 year ago
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