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pashok25 [27]
2 years ago
12

8. Solve the system of equations shown by substitution.

Mathematics
1 answer:
Radda [10]2 years ago
7 0

Answer:

J. (2, -3)​

Step-by-step explanation:

1. Substitute y = x - 5 in for y in the other equation:

5x + 2(x - 5) = 4

2. Simplify:

5x + 2x - 10 = 4 (distributed the 2)

7x - 10 = 4

3. Isolate for x:

7x - 10+10 = 4+10

7x = 14

7x/7 = 14/7

x = 2

4. Plug the new x value into an equation and solve for y:

y = 2 - 5

y = -3

hope this helps!

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An e-book reader regularly sells for $220. It is on sale for 15% off
MaRussiya [10]

Answer:

Answer is $10,144.50

Step-by-step explanation:

15% of 220 =33

220- 33 = 187

8.5% of 187 =15.89

187+15.89=202.89

202.89 x 50 =10,144.50

3 0
3 years ago
If f(c)=0, which of the following statements must be true?
Tju [1.3M]

Answer:

C.

Step-by-step explanation:

If f(c)=0 then (c,0) is on the graph.

In general, if f(a)=b then (a,b) is on the graph.

By factor theorem if f(c)=0 then x-c is a factor.

If x-c is a factor then x-c will divide f(x) evenly.  We know this because the remainder will be 0 because we know x-c is a factor of f.

The only choice that I have said in this whole thing that is true is C.

7 0
3 years ago
Read 2 more answers
Super store buys a basketball for $8.00 and marks it up by 40% . Find the markup amount and the selling price .
Fynjy0 [20]

If your cost is $8.00 and you wish to markup that price by 40%, 80% + 40% = 120%. Divide the $8.00 cost by 120% and get the retail price of $15.00. Therefore, the markup amount is $7.00 ($15.00 - $8.00 = $7.00) and the selling price is $15.

5 0
3 years ago
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Consider the given density curve.
sattari [20]

The best approximation for the median is 3.6.

An illustration of a numerical distribution with continuous results is a density curve. A density curve is, in other words, the graph of a continuous distribution. This implies that density curves can represent continuous quantities like time and weight rather than discrete events like rolling a die (which would be discrete). As seen by the bell-shaped "normal distribution," density curves either lie above or on a horizontal line (one of the most common density curves).

For the given density curve, the area under the density curve is

A=(1/2)×5×(1/2)=5/4

now, for the median, the area on the left and the area on the right of the median.

Let the median be x, then

The area criteria we get

(1/2)x(x/10)=(5/4)/2

⇒x²=5*20/4=25/2

So, we get x=5/(\sqrt2)=3.5 ≈ 3.6

Hence the required answer is option 3.6

Learn more about density curves here-

brainly.com/question/18345488

#SPJ10

4 0
1 year ago
Chase measured a line for his are project. it is 200 mm long <br> how many cm is this line
mylen [45]
20 cm is the answer because every 10 mm is 1 cm
6 0
2 years ago
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