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Ray Of Light [21]
2 years ago
10

Sam purchased a video game for $19.99 but paid $22.65. Sam paid $ in sales tax.

Mathematics
1 answer:
yulyashka [42]2 years ago
3 0
He paid $2.66 in sales tax to find the correct answer you take 22.65-19.99 equals 2.66
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Which matrix represents the system of equations shown below?<br> 4x - 2y = 8<br> 2x-3y = 12
Serjik [45]

Answer:

4x-2y=8

or, 4x = 8+2y

or x = 8+2y/4-----(eq.1)

2x-3y=12-----(eq.2)

Now,

putting value of eq.1 in eq.2, we get

2x-3y=12

or, (8+2y/4)-3y = 12

or, 8-10y/4=12

or, 8-10y=12×4

or,8-10y=48

or,-10y=48-8

or,y=40/-10

or, y = -4

again,

2x-3y=12

or, 2x-3×-4=12

or, 2x+12=12

or, x=0

In 1st option

4x-2y=8

or,4×0-2×-4=8

or,0+8=8

8=8

2x-3y=12

2×0-3×-4=12

0+12=12

12=12

So 1st option is true

3 0
3 years ago
When was the midpoint formula invented?
Leokris [45]

In was invented in 1596.

5 0
3 years ago
If the nth term of a number sequence is n² – 3, find the first 3 terms and the 10th term​
nignag [31]

Answer:

-2, 1, 6 and 97

Step-by-step explanation:

Tn = n² - 3

First Term : T1 = (1)² - 3 = -2

Second Term : T2 = (2)² - 3 = 1

Third Term : T3 = (3)² - 3 = 6

Tenth Term : T10 = (10)² - 3 = 97

6 0
3 years ago
Describe in words how you would solve the linear system y = 3x + 1 and y = - 2x + 3.
Sergio [31]
We are using substitution to solve this problem.

y=3x+1
y=-2x+3
Make these equal each other: 3x+1=-2x+3
Add 2x to both sides: 3x+2x+1=-2x+2x+3
= 5x+1=3
Subtract 1 from both sides; 5x+1-1=3-1
= 5x=2
Divide 5 from both sides: 5x/5=2/5
X= 2/5
Plug X into one of the equations: y=3(2/5) +1
y=11/5(2.2)

(2/5,11/5)
5 0
3 years ago
The table shows the number of practice problems completed in 30 minutes in three samples of 10 randomly selected math students.
horsena [70]

Answer: C. a prediction based on the data is reliable, because the means of the samples are close together.

Step-by-step explanation:

7 0
3 years ago
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