Ask question

Ask question

All categories

3 years ago

14

Mia's mother gives her $10 per week for allowance Mia gets an additional $3 for every hour she spends watching

2 answers:

nika2105 [10]3 years ago

8 0

Answer:

10+3t=25

Step-by-step explanation:

Cloud [144]3 years ago

4 0

Answer:

5 times

Step-by-step explanation:

$25 - $10 (fixed rate) = $15

$15 / $3 = 5 times.

Mia must watch her brother 5 times within the week to make the desired amount. Hope this helps :)

You might be interested in

What is the greatest common factor of 56, 80 and 56?

Irina-Kira [14]

The greatest common factor would be 8

3 0

3 years ago

Read 2 more answers

What is the domain of this graph?

Elenna [48]

A. Whole numbers from 0 to 10

The domain is composed of all x value on the graph. Every point is on a whole number for x.

7 0

3 years ago

If the sin 90° is 1, then the cos ____ °= _____.

borishaifa [10]

Maybe:
Cos90=0
I’m not sure of the question here

5 0

3 years ago

Read 2 more answers

. Fiona has $1.20 with which to buy some ribbon.The ribbon is on sale for $0.08 per foot.How many feet of ribbon can Fiona buy

gogolik [260]

Respuesta: 4.5 pies que puede comprar si tiene $ 11.25

Explicación paso a paso:

Dado que hemos dado que

Costo de los dulces por pie = $ 2.50

Dinero total que gastó en dulces = $ 11.25

Sea x el número de pies que puede comprar

Ahora, según la pregunta, obtenemos eso,

Entonces, 4.5 pies que puede comprar si tiene $ 11.25.

8 0

3 years ago

A 15-ft ladder leans against a wall. The lower end of the ladder is being pulled away from the wall at the rate of 1.5 ft/sec. L

Aleks [24]

Answer:

The top of the ladder is sliding down at a rate of 2 feet per second.

Step-by-step explanation:

Refer the image for the diagram. Consider $\Delta ABC$ as right angle triangle. Values of length of one side and hypotenuse is given. Value of another side is not known. So applying Pythagoras theorem,

$\left ( AB \right )^{2}+\left ( BC \right )^{2}=\left ( AC \right )^{2}$

From the given data, $L=15\:ft=AC$ , $y=9\:ft=AB$ and $x=BC$

Substituting the values,

$\therefore \left ( 9 \right )^{2}+\left ( x \right )^{2}=\left ( 15 \right )^{2}$

$\therefore 81+x^{2}=225$

$\therefore x^{2}=225-81$

$\therefore x^{2}=144$

$\therefore \sqrt{x^{2}}=\sqrt{144}$

$\therefore x=\pm 12$

Since length can never be negative, so $x= 12$ .

Now to calculate $\dfrac{dy}{dt}$ again consider following equation,

$\left ( y \right )^{2}+\left ( x \right )^{2}=\left ( l \right )^{2}$

Differentiate both sides of the equation with respect to t,

$\dfrac{d}{dt}\left(y^2+x^2\right)=\dfrac{d}{dt}\left(l^2\right)$

Applying sum rule of derivative,

$\dfrac{d}{dt}\left(y^2\right)+\dfrac{d}{dt}\left(x^2\right)=\dfrac{d}{dt}\left(l^2\right)$

$\dfrac{d}{dt}\left(y^2\right)+\dfrac{d}{dt}\left(x^2\right)=\dfrac{d}{dt}\left(225\right)$

Applying power rule of derivative,

$2y\dfrac{dy}{dt}+2x\dfrac{dx}{dt}=0$

Simplifying,

$y\dfrac{dy}{dt}+x\dfrac{dx}{dt}=0$

Substituting the values,

$9\dfrac{dy}{dt}+12\times1.5=0$

$9\dfrac{dy}{dt}+18=0$

Subtracting both sides by 18,

$9\dfrac{dy}{dt}=-18$

Dividing both sides by 9,

$\dfrac{dy}{dt}= - 2$

Here, negative indicates that the ladder is sliding in downward direction.

$\therefore \dfrac{dy}{dt}= 2\:\dfrac{ft}{sec}$

7 0

3 years ago