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SashulF [63]
3 years ago
5

Which of the following has no solution?

Mathematics
1 answer:
umka2103 [35]3 years ago
5 0
I think it’s the last one I’m sorry if it’s wrong I’m doing the same thing in math and I just started it today
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The quantity y varies directly with the square of x and inversely with z. When x is 9 and z is 27, y is 6. What is the constant
ira [324]
\bf \qquad \qquad \textit{double proportional variation}
\\\\
\begin{array}{llll}
\textit{\underline{y} varies directly with \underline{x}}\\
\textit{and inversely with \underline{z}}
\end{array}\implies y=\cfrac{kx}{z}\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad  variation
\end{array}\\\\
-------------------------------

\bf \stackrel{\textit{\underline{y} varies directly with the square of \underline{x} and inversely with \underline{z}}}{y=\cfrac{kx^2}{z}}
\\\\\\
\textit{we also know that }
\begin{cases}
x=9\\
z=27\\
y=6
\end{cases}\implies 6=\cfrac{k9^2}{27}
\\\\\\
\cfrac{27\cdot 6}{9^2}=k\implies 2=k
4 0
3 years ago
If 6 is added to twice a number and this sum is multiplied by 5​, the result is the same as if the number is multiplied by negat
lutik1710 [3]

Answer:

  -2

Step-by-step explanation:

We assume you want to find the number. Let it be represented by x.

  (6+2x)·5 = -3x +4 . . . . . the meaning of the problem statement

  30 +10x = -3x +4 . . . . . eliminate parentheses

  26 +13x = 0 . . . . . . . . . add 3x-4 to both sides

  2 + x = 0 . . . . . . . . . . . . divide by 13

  x = -2 . . . . . . . . . . . . . . subtract 2

The number is -2.

3 0
3 years ago
Given f(x)=3x+8 and g(x)=6x+6<br><br> then what is (f+g)(−1))<br><br> ?
tankabanditka [31]
(f+g)(-1)
=f(-1)+g(-1), so;
f(x)=3x+8
f(-1)=3(-1)+8
f(-1)=-3+8
f(-1)=5

g(x)=6x+6
g(-1)=6(-1)+6
g(-1)=-6+6
g(-1)=0
Finally:
f(-1)+g(-1)
=5+0
=5. As a result, (f+g)(-1) is 5. Hope it help!
7 0
3 years ago
Add 11/6x and 2/13x<br><br> Add 11/6x and 2/13x
Natalija [7]

Answer:

Hii the correct answeeer is B.

8 0
3 years ago
Question 11 in my book. <br><br> y x 6 for y = 2/3<br><br> what is the answer
trapecia [35]
The answer is 4. I hope this helped.

8 0
2 years ago
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