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3 years ago

Please help with #22! You don’t have to fully explain.

Mathematics

2 answers:

erik [133]3 years ago

4 0

3.5 strip As will fit into Strip b. 2/7 strip Bs will fit into strip A

Zanzabum3 years ago

3 0

It would take 2/7 of strip b to make strip a and 3 1/2 strip As to make a strip B

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Brad wants to buy flowers for his friend with $33. The daisies are $1 each and the roses are $3 each. He buys 3 more daisies tha

Darina [25.2K]

Let x=the amount of roses that Brad buys. (x+3)=the number of daisies that Brad buys.

x+(x+3)=33

Simplify this problem to find the amount of roses:

2x+3=33

2x=30

x=15

So, Brad buys 15 roses and 18 daisies.

Since roses cost $3, 15*3=45.

The roses cost $45.

Hope this helps! :)

8 0

3 years ago

The relation {(-1, 4), (2, 7), (3, 7)} is a function.

natita [175]

Answer:

Yes this is correct. Each x value is put with only one y value.

Step-by-step explanation:

6 0

3 years ago

210 students were asked whether they want to go to a water park or a roller skating rink for a class party.

tankabanditka [31]

Answer: How many boys want to go skating

Step-by-step explanation: sorry if wrong but if you add 50 and 45 and 60 you get 155 that is not 210 so 2

7 0

3 years ago

Read 2 more answers

Classify the triangle with angles measuring 85°, 60°, and 35°.

OLEGan [10]

They are acute angels cause there smaller than 90

6 0

3 years ago

Read 2 more answers

The surface area of a sphere is increasing at a rate of 14\pi14π14, pi square meters per hour. At a certain instant, the surface

Sauron [17]

Answer:

$21\pi$ cubic meters per hour

Step-by-step explanation:

We know that the surface area of a sphere is,

$A=4\pi r^2$ ...........(1),

Where,

r = radius of the sphere,

We have, A = $36\pi$ square meters,

$36\pi = 4\pi r^2$

$9 = r^2$

$\implies r = 3\text{ meters}$

Now, differentiating equation (1) with respect to t ( time ),

$\frac{dA}{dt} = 8\pi r\frac{dr}{dt}$

We have,

$\frac{dA}{dt}=14\pi\text{ square meters per hour}, r = 3\text{ meters}$

$14\pi = 8\pi (3) \frac{dr}{dt}$

$\frac{14}{24}=\frac{dr}{dt}$

$\frac{7}{12} = \frac{dr}{dt}$

Also, the volume of a sphere is,

$V = \frac{4}{3}\pi r^3$

Differentiating with respect to t(time)

$\frac{dV}{dt}=4\pi r^2\frac{dr}{dt}$

By substituting the values,

$\frac{dV}{dt}=4\pi (3)^2 (\frac{7}{12})=36\pi \frac{7}{12}=21\pi\text{ cube meters per hour}$

Hence, the rate of change of the volume of the sphere at that instant would be $21\pi$ cubic meters per hour

7 0

3 years ago