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rosijanka [135]
3 years ago
10

HELP ASAP STEP BY STEP FIRST TO ANSWER IS BRAINLEIST!​

Mathematics
2 answers:
irina [24]3 years ago
8 0

卂几丂山乇尺

_____________________

7) 8hours

8) 10 pizzas

9) 13 packets

_______________________

EXPLANATION .:

_____(7)______________

Stacy's earning per hour babysitting

= 12$

Thus on Friday to earn 36$,

she would have worked 36/12 = 3 hours

On Saturday she earned 60$,

thus the time she worked = 60/12 = 5 hours

So the total time Stacy babysited on both days = 3+5 = 8hours

_______(8)__________________

Total ounces with Marco = 147

Ounces required for 1 pizza = 13

Ounced required for 1 breadstick = 2

Now when he has already made 3 breadsticks thus he would have used 3×2 = 6 ounces

So the remaining ounces = 147-6 = 141

Hence he can make 141/13 = 10.8 or 10 pizzas.

___________(10)_____________

Mr.Dundford gives 6 pencils to each student => for 30 students the pencils required would be 30×6 = 180

Now when he had already 24 pencils Thus the remaining = 180-24 = 156

Also there are 12 pencils in a packet

=> packets required = 156/12 = 13

___________________________

___________________

____________

_______

___

xxMikexx [17]3 years ago
6 0

Stacey babysitted 3 hours on Friday and 5 hours on Saturday.

Step-by-step : 12•3 = 36 12•5=60

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kherson [118]

Answer:

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Step-by-step explanation:

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The length of the shaded region is given by

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We are left with a quadratic equation.

We may solve the quadratic equation using quadratic formula.

The quadratic formula is given by

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Where

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x=\frac{-(-38)\pm\sqrt{(-38)^2-4(18)(15)}}{2(18)} \\\\x=\frac{38\pm\sqrt{(1444- 1080}}{36} \\\\x=\frac{38\pm\sqrt{(364}}{36} \\\\x=\frac{38\pm 19.078}{36} \\\\x=\frac{38 +  19.078}{36} \: or \: x=\frac{38 - 19.078}{36}\\\\x= 1.59 \: or \: x = 0.53 \\\\

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V =  \frac{1}{2} (5 – 3(1.59)) \times (3 - 2(1.59)) \times (1.59) \\\\V = -0.03 \: cm^3 \\\\

Volume of the box at x= 0.53:

V =  \frac{1}{2} (5 – 3(0.53)) \times (3 - 2(0.53)) \times (0.53) \\\\V = 1.75 \: cm^3

The volume of the box is maximized when x = 0.53 cm

Therefore,

x = 0.53 cm

Maximum volume = 1.75 cm³

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