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seraphim [82]
2 years ago
5

Help please please !!!!!!!

Mathematics
1 answer:
lyudmila [28]2 years ago
7 0
In each case, you can use the second equation to create an expression for y that will substitute into the first equation. Then you can write the result in standard form and use any of several means to find the number of solutions.

System A
  x² + (-x/2)² = 17
  x² = 17/(5/4) = 13.6
  x = ±√13.6 . . . . 2 real solutions

System B
  -6x +5 = x² -7x +10
  x² -x +5 = 0
The discriminant is ...
  D = (-1)²-4(1)(5) = -20 . . . . 0 real solutions

System C
  y = 8x +17 = -2x² +9
  2x² +8x +8 = 0
  2(x+2)² = 0
  x = -2 . . . . 1 real solution
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Answer:

C) 273 ft²

Step-by-step explanation:

7x11x3=231

2x1/2x7x6=42

231+42=273

3 0
3 years ago
2,381,579 expanded form
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2,000,000+300,000+80,000+1,000+500+70+9 is 2,381,579 in expanded form.

7 0
3 years ago
Read 2 more answers
Please answer right away
spayn [35]

<u>Answer:</u>

The correct answer option is \frac { 4 } { 4 9 }.

<u>Step-by-step explanation:</u>

We are to find the probability that both your parents were born on weekend (either Saturday or Sunday).

Total number of days in a week = 7

Number of days in weekend = 2

Probability of being born on weekend = \frac { 2 } { 7 }

P (both parents were born on weekend) = \frac{2}{7} \times \frac{2}{7} = 4/49

3 0
3 years ago
Samuel has a hamster cage that is a rectangular prism. It is 20 1/2 inches long, 12 inches
AleksandrR [38]

Answer:

Step-by-step explanation:

Volume= length × width × height.... Volume= 20 1/2 × 12 × 10 1/4..... Volume= 2521 1/2 cubic inches or 2521.5 cubic inches

6 0
3 years ago
A bag contains 14 red marbles and 6 blue marbles. two marbles are randomly drawn without replacement. find the probability that
Ksenya-84 [330]
We take 2 marbles from 20 marbles and the total ways is 20x19:2=190
But we need only 2 red marbles and the ways is 14x13:2=91
And finally we do the division 91:190=91/190 is the probability we need
7 0
3 years ago
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