All categories

4 years ago

Which situation can be represented by the equation x + 15 = 42?

Mathematics

1 answer:

Murljashka [212]4 years ago

8 0

Answer:

The last answer - If a grocery adds 15 pieces of fruit to a basket, there are now 42 pieces on the basket. How many pieces of fruit were already in the basket?

You might be interested in

Find the area between the graph of the given function and the x-axis over the given interval, if possible.

icang [17]

Answer:

Not possible to find out area

Step-by-step explanation:

Given is an exponential function as

$f(x) =e^{-x}$ and we have to find the area to the left of e above x axis under the curve.

Using integrals, we find area =

$\int\limits^e_{-\infty} e^{-x} \, dx\\=-e^{-x}$

substitute limits

When we substitute -infinity we get e^infty which is again infinity

Hence finding out area is not possible.

The integral of area diverges.

7 0

4 years ago

I need to calculate a=8c-b divided by c, how do I calculate?

laila [671]

Answer:

Step-by-step explanation:

8xC-Bdivide by c

5 0

4 years ago

How would u find the surface area with work and answer plzzzzz

ivolga24 [154]

The answer would be 317.03

6 0

3 years ago

Read 2 more answers

One week John earned three times as much as Alex earned mowing lawns. If they earned $48 altogether,how much did each one earn

Allisa [31]

Answer:Alex earned $12

John earned $36

Step-by-step explanation:

j=3a

a+3a=48

4a=48

a=48/4

a=12

j=36

8 0

4 years ago

A plane flew 720 mi with a steady 30 mi/h tailwind. The pilot then returned to the starting point, flying against that same wind

NNADVOKAT [17]

Answer:

Plane's speed is 150 miles/hour

Step-by-step explanation:

Let the plane's airspeed be x

Speed of wind is 30 miles/hour

When a plane flew with the wind , Speed = (x+30)

So, the speed plain with wind on going = (x+30)

Since we are given that on returning plane fly against the wind .

So,When a plane flew against the wind , Speed = (x-30)

So, the speed plain against wind on returning = (x-30)

Distance = 720 miles .

$Time = \frac{Distance}{Speed}$

So, time on going $=\frac{720}{(x+30)}$

Time on returning $=\frac{720}{(x-30)}$

Now we are given that the total time for the whole trip (going + returning) = 10 hours.

So, $\frac{720}{(x+30)}+\frac{720}{(x-30)}=10$

$\frac{720x-21600+720x+21600}{(x+30)(x-30)}=10$

$720x-21600+720x+21600=10(x+30)(x-30)$

$720x+720x=10(x+30)(x-30)$

$1440x=10(x^2 -[30]^2)$

$144x=x^2 -900$

$x^2-144x -900=0$

$x^2-150x+6x -900=0$

$x(x-150)+6(x -150)=0$

$(x-150)(x+6)=0$

$x= 150,x= -6$

So, the plane's speed is 150 miles/hour

4 0

3 years ago