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3 years ago

What’s the domain of x^2+3

Mathematics

1 answer:

salantis [7]3 years ago

4 0

im not sure if you want the solution or interval notation. i'll put both

solution: -oo < x < oo

interval notation: (-oo, oo)

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Solve. Five times a number is 110 less than 7 times the number. Find the number.

pochemuha

Answer:

<h2>ANSWER </h2>

 

$5x = 7x - 110 \\ - 2x = - 110 \\ x = 55$

SO THE VALUE OF X = 55

hope it helps

8 0

3 years ago

Helpppppppppppppppppppppppp

Vaselesa [24]

The first thing to is factor the denominator of the rational function:
$x^{2} -2x-3$ to do this we'll need to find two number whose product is -3 and its sum is -2; those numbers are 1 and -3, so:
$x^{2} -2x-3=(x+1)(x-3)$
Now we can rewrite our rational function as follows:
$f(x)= \frac{x-3}{(x+1)(x-3)}$
Notice that we have a common factor (x-3) in both numerator and denominator; therefore we can cancel them:
$f(x)= \frac{1}{x+1}$

Taking all the above into consideration we realize that x=3 is a removable discontinuity; the correct answer is the first one: there is a hole in x=3 and asymptote at x=-1.

4 0

3 years ago

Express 10/4 as a mixed fraction

mars1129 [50]

The answer is (2 1/2) but without the brackets

7 0

2 years ago

Read 2 more answers

A motorboat maintained a constant speed of 15 miles per hour related to water going 44 miles upstream then returning the total t

yanalaym [24]

The speed of the current is 13 mph

<h3>What is speed?</h3>

speed refers to distance travelled per unit time. This is a vector quantity this implies that it has magnitude and direction.

The unit for speed as used here is miles per hour and can be written in short form as mph

Given data

speed of boat = 15 miles per hour = 15 mph

distance = 44 miles upstream

total time for the trip = 7.5 hours

<h3>solving for the speed of the current</h3>

let the water current be x

speed = distance / time

the total travel time upstream and downstream is known

for upstream

15 - x = 44 / time

time = 44 / 15 - x

for downstream

15 + x = 44 / time

time = 44 / 15 + x

total time = time for upstream + time for downstream = 7.5

7.5 = (44 / 15 - x ) + ( 44 / 15 + x )

7.5 = ( 44 ( 15 + x ) + 44 ( 15 - x ) ) / ( 15 + x )( 15 - x )

7.5 ( 15 + x )( 15 - x ) = 210 +44x + 210 - 44x

7.5 ( 225 - x ^ 2 ) = 420

( 225 - x ^ 2 ) = 56

169 = x ^ 2

x = sqrt ( 169 )

x = 13 miles per hour

hence speed of current is 13 miles per hour

Read more on speed here: brainly.com/question/4931057

#SPJ1

3 0

1 year ago

V(t) = 1 + 2sin(t^2/2) solve for t

Crank

Answer:

omg i'm so sorry thats the wronge answer i ment this to go to a diffrent question

Step-by-step explanation:

7 0

3 years ago