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Tanya [424]
2 years ago
12

At a lemonade stand, the first cup costs $1.50, and refills cost $0.20 each. If a customer paid $1.90 in total for his first cup

and refills, how many refills did the customer order?
Mathematics
1 answer:
timofeeve [1]2 years ago
3 0

Answer:

the customer got 2 refills

Step-by-step explanation:

$1.50 +20= $1.70+20= $1.90 hope this helps

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For what value(s) of k is the linear system consistent? (Enter your answers as a comma-separated list.)
AleksAgata [21]

Answer:

Step-by-step explanation:

Given

6x_1-9x_2=8

9x_1+kx_2=-1

The given system is AX=B can be represented by

\begin{bmatrix}6 &-9 \\ 9 & k\end{bmatrix}\begin{bmatrix}x_1\\ x_2\end{bmatrix}=\begin{bmatrix}8\\ -1\end{bmatrix}

The given system is consistent when determinant of A is not equal to zero

|A|

|A|=6k-(-81)=6k+81

k\neq \frac{-27}{2}

i.e. system is consistent for all value of k except k=\frac{-27}{2}

R-\frac{-27}{2}

                 

4 0
3 years ago
Read 2 more answers
Find the value of x that makes m|n.<br> m<br> (6x + 10)<br> (2x + 26)<br> The value of x is ?
olga nikolaevna [1]

Answer:

x is 9

Step-by-step explanation:

6x+10=2x+26

-2x          -2x

4x+10=26

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---   ---

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8 0
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There are three marbles in a bag. One is red and two are black. What is the probability of picking a black marble first, putting
Maru [420]

Answer:

well for me I think

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2/3×2/3

4/9

since they are replacing the black marbles back

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Answer 54 is the correct answer

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