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Zina [86]
3 years ago
12

Solve by simplifying the problem. There are 18 students in Mr. Alvarez’s art class. Throughout the year, every student must pair

up with every other student to complete a project. How many projects will be finished?
A. 149 projects
B. 153 projects
C. 171 projects
D. 135 projects
Mathematics
1 answer:
djyliett [7]3 years ago
5 0
Not enough clues to answer this question
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How many square meters of brick pavements must be laid out for a 4 meter wide walk around a circular flower bed 22 meters wide i
Ronch [10]

Answer:

603.2 meters

Step-by-step explanation:

circle - the outside of the walk in this case. This circle has a

diameter of 22 + 8 m, therefore a radius of 15m. The inner circle

has a diameter of 22m - as given - a radius of 11m.

You subtract the area of the inner circle from that of the larger circle.

4 0
3 years ago
Read 2 more answers
your car broke down and the final bill was $306.50. The part that was replaced cost $119 and the charge mechanics labor was 75 p
erastova [34]

Answer:

\huge\boxed\text{Equation:}\huge\boxed{\text{Equation:   }119+75x=306.50}\\

\huge\boxed{\text{Hours worked on:   } 2.5}

Step-by-step explanation:

We can create an equation for this problem by converting the words to an equation.

The <em>flat fee</em> was $119. We then add $75 for every hour worked. This means that this becomes 119+75x. Since the total cost was $306.50, the equation is 119+75x=306.50.

We can now solve for x, the amount of hours worked, to find it’s value.

119 + 75x = 306.5\\\\75x=187.5\\\\x = 2.5

Hope this helped!

5 0
3 years ago
Help Please.Pls.Pls.Pls.Pls
Natasha2012 [34]

Answer:

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Step-by-step explanation:

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4 years ago
Z=(x+y)ex,x=3t,y=2−t2, find dz/dt using the chain rule. assume the variables are restricted to domains on which the functions ar
luda_lava [24]
z=(x+y)e^x
\begin{cases}x=3t\\y=2-t^2\end{cases}

\dfrac{\mathrm dz}{\mathrm dt}=\dfrac{\partial z}{\partial x}\dfrac{\mathrm dx}{\mathrm dt}+\dfrac{\partial z}{\partial y}\dfrac{\mathrm dy}{\mathrm dt}
\dfrac{\mathrm dz}{\mathrm dt}=(e^x+(x+y)e^x)(3)+e^x(-2t)
\dfrac{\mathrm dz}{\mathrm dt}=3(1+x+y)e^x-2te^x
\dfrac{\mathrm dz}{\mathrm dt}=3(1+3t+2-t^2)e^{3t}-2te^{3t}
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7 0
4 years ago
Negative 10 over 7 minus one over seventy
Hunter-Best [27]

Answer:

-1.44285714286

Step-by-step explanation:

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2 years ago
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