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aleksklad [387]
3 years ago
11

What is 3x - y = 17 x + y = -5

Mathematics
1 answer:
Virty [35]3 years ago
3 0

Answer:

{x,y}={6,1}

Step-by-step explanation:

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4. Kennedy buys a computer that was reduced in a sale by 10%. If the sale price of the
givi [52]

Answer:

N$12 576. 11

Step-by-step explanation:

Loss%=10%

S.P= N$11 480.50

C.P =?

Loss%=100(C.P - S.P)/C.P

10=100(C.P-11 480.50)/C.P

10C.P=100C.P - 1 148 050

1 148 050=100C.P - 10C.P

1 148 050=90C.P

C.P=N$12 576.11

6 0
3 years ago
The Brown family needs to rent a truck for their upcoming move. Express Movers will charge them $25 for the first day and $0.80
ankoles [38]
Express Movers equation would be y= 25 + .8x
Smith equation would be y= 35 + .6x
if you went 14 miles with Movers, you would go 1 mile with Smith for the same price.
8 0
3 years ago
Hello<br> I have to write at least 20 words to say hi.
maksim [4K]
Hi

I have to write at least 20 words to say hello.
7 0
3 years ago
Directed line segment DE has endpoints D(-4,-2) and E(1,8). Point F divides DE such that DF:FE is 3:2What are the coordinates of
VMariaS [17]

The Solution.

The given points are

D(-4,-2)\text{ and E(1,8)}

The formula is

\frac{mx_2+nx_1}{m+n}_{},\frac{my_2+ny_1}{m+n}

In this case,

m=3,n=2

Therefore,

\begin{gathered} (\frac{mx_2+nx_1}{m+n}_{},\frac{my_2+ny_1}{m+n}) \\ =(\frac{3(1)+_{}2(-4)_{}}{3+2}_{},\frac{3(8)_{}+2(-2)_{}}{3+2}) \\  \end{gathered}=(\frac{3-8}{5},\frac{24-4}{5})=(-\frac{5}{5},\frac{20}{5})=(-1,4)

Hence, the correct answer is (-1, 4) (option 3)

3 0
1 year ago
Charlene is a video game designer and wants to make sure that her games can be played on all types of screens. In order for the
natka813 [3]
<h3>Answer:</h3>

C. The playable area has a width of 9 inches and a height of 6 inches.

<h3>Explanation:</h3>

There are a number of ways you can get there.

1. Check the answers to see which have the right area and aspect ratio.

  • A: area = 24 in² — does not match 54 in²
  • B: area = 54 in², aspect ratio 6:9 = 2:3 — does not match 3:2 aspect ratio
  • C: area = 54 in², aspect ratio 9:6 = 3:2 — <em>matches problem statement</em>
  • D: area = 121.5 in² — does not match 54 in²

2. If the screen were 3:2 (inches), its area would be 6 in². The area of 54 in² is 9 times that value, so the actual screen dimensions are √9 = 3 times 3:2. That is, they are width:height = 9:6 inches — matches selection C.

3. You can write equations for width and height and solve.

  • w/h = 3/2
  • wh = 54

Substituting w=3/2·h into the second equation gives

... (3/2)h·h = 54

... h² = 36 . . . . . multiply by 2/3

... h = √36 = 6 . . . . square root, result in inches . . . . matches selection C

3 0
3 years ago
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