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Marysya12 [62]
2 years ago
5

What do I do in all of them!?! Plz help me!!!

Mathematics
2 answers:
Montano1993 [528]2 years ago
5 0
10: a=lxw
11: h=2s (h= # of hotdogs) (s= # of students)
12: 4xw (w=amount of windows)
13: 2+1.10m (m= amount of miles)
14: im not sure sorry
15: 0.25p=c (p= pounds of potatoes) (c=total cost)
16:49+.05t=b (t= amount of texts) (b= total cost of bill)
Studentka2010 [4]2 years ago
3 0
11. # of hot dogs= 2s
12. The amount of materials= 4w
13. y= 1.10m + 2
14. t= 0.08d
15. c= 0.25p
16. b= 0.05t + 49
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-8(2x +x )/-2y , if x=-5, y=2 and z=0
Masteriza [31]

Answer:

<h3>              -8(2x +x )/-2y  = - 30</h3>

Step-by-step explanation:

x=-5, y=2 and z=0

-8(2x +x )/-2y =(-8•3x)/-2y = [-8•3(-5)] / (-2•2) = 120/(-4) =-30

5 0
3 years ago
Please help thank you
CaHeK987 [17]

Answer:

a) x=-3

b) y=2,5

have a nice day

6 0
3 years ago
Read 2 more answers
Find the quadratic function that fits the following data. which one function fits.
Oksana_A [137]

Answer:

C

Step-by-step explanation:

The general rule for the quadratic function is

y=ax^2+bx+c

Use the data from the table:

y(50)=130\Rightarrow 130=a\cdot 50^2+b\cdot 50+c\\ \\y(70)=130\Rightarrow 130=a\cdot 70^2+b\cdot 70+c\\ \\y(90)=200\Rightarrow 200=a\cdot 90^2+b\cdot 90+c

We get the system of three equations:

\left\{\begin{array}{l}2500a+50b+c=130\\ \\4900a+70b+c=130\\ \\8100a+90b+c=200\end{array}\right.

Subtract these equations:

\left\{\begin{array}{l}4900a+70b+c-2500a-50b-c=130-130\\ \\8100a+90b+c-2500a-50b-c=200-130\end{array}\right.\Rightarrow \left\{\begin{array}{l}2400a+20b=0\\ \\5600a+40b=70\end{array}\right.

From the first equation

b=-120a

Substitute it into the second equation:

5600a+40\cdot (-120a)=70\Rightarrow 800a=70,\\ \\ a=\dfrac{7}{80},\\ \\ b=-120\cdot \dfrac{7}{80}=-\dfrac{21}{2}=-10.5

So,

2500\cdot \dfrac{7}{80}+50\cdot (-10.5)+c=130\Rightarrow 218.75-525+c=130\\ \\c=130-218.75+525=436.25

The quadratic function is

y=\dfrac{7}{80}x^2-10.5x+436.25\\ \\y=0.0875x^2-10.5x+436.25

4 0
3 years ago
What is the coefficient of the second term in the expression 2n+7m+6​
Nady [450]

Answer:

the answer is seven.

Step-by-step explanation:

8 0
2 years ago
Help me please..!!!!
wariber [46]
I think it is D but i am not too sure
3 0
3 years ago
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