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user100 [1]
3 years ago
6

How many solutions does this linear system have?

Mathematics
1 answer:
Tanya [424]3 years ago
8 0

Answer:

B (2.5, 0)

Step-by-step explanation:

2x - y = 5 (multiply all by 4)

8x- 4y = 20

-8x - 4y = - 20

eliminate the 4y

8x- 4y = 20

-8x - 4y = - 20

-------------------- –

16x = 40

x = 40/16 = 2.5

now we substitute x with 2.5

2x - y = 5

2(2.5) - y = 5

y = 0

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Sarah cannot completely remember her four-digit ATM pin number. She does remember the first two digits, and she knows that each
OLga [1]

Answer:

3/16 or 0.1875

Step-by-step explanation:

Since she remembers the first two digits, she only has to guess the last two digits. If both digits are greater than 5, there are 4 possible alternatives for each digit (6, 7, 8 or 9).

In three tries, the probability that she will get it right is:

P=\frac{3}{4*4}\\P=\frac{3}{16}=0.1875

The probability she will get access to her account is 3/16 or 0.1875.

4 0
3 years ago
Solve similar triangles solve for x can someone answer please help
zlopas [31]

Answer:

Step-by-step explanation:

ΔABC & ΔADE are similar triangles

\frac{AD}{AB}=\frac{DE}{BC}\\\\\frac{12}{4}=\frac{12}{x}\\

Cross multiply,

12*x = 12*4

x=12*\frac{4}{12}\\

x = 1 * 4

x = 4

8 0
3 years ago
What is the area of the triangle below?
Cloud [144]
The area of the triangle below is 7.5 units
7 0
3 years ago
uincy uses the quadratic formula to solve for the values of x in a quadratic equation. He finds the solution, in simplest radica
Verdich [7]

Answer: according to spark notes: There can be 0, 1, or 2 solutions to a quadratic equation, depending on whether the expression inside the square root sign, (b2 - 4ac), is positive, negative, or zero. This expression has a special name: the discriminant.

In this case it is 0, not 2, which was my first and wrong answer





3 0
3 years ago
Read 2 more answers
Brenda had bowling scores of 92, 110, 85, 78, and 96. She completed the steps below to determine the score she needs in her next
Yakvenalex [24]

Answer:

<u>Hence final answer is B: Step 2.</u>

Step-by-step explanation:

Step 1: Find the total points needed to score in six games: 96x6=576

Justification:

Product of 96 and 6 is 576 which is same number found by Brenda. So step 1 is correct.


Step 2: Find the total points scored: 92+110+85+78=365

Justification:

Sum of total points scored by Brenda is 92+110+85+78= 461.

But she got different value 365.

Hence step 2 is wrong.


<u>Hence final answer is B: Step 2.</u>

3 0
3 years ago
Read 2 more answers
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