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denpristay [2]
3 years ago
10

There are 12 girls and 13 boysin a classroom how many ways can i select a girl or boy​

Mathematics
1 answer:
Orlov [11]3 years ago
5 0

Answer:

by identifying their gender

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Anyone know the answer?? ​
Serggg [28]

Answer:

the second option

Step-by-step explanation:

in ax²+bx+c = 0:

x = \frac{-b+-\sqrt{b^2-4ac} }{2a}

subtract both sides by 6 to get to this form, as the right side will be left with 0

6x² + 8x - 6 = 0

here, the coefficient for x² (a) is 6, the coefficient for x (b) is 8, and the remaining number added on (c) is -6

plugging our numbers into the formula, we get

x = \frac{-8+-\sqrt{(-8)^2-4(6)(-6)} }{2(6)}\\= \frac{-8+-\sqrt{64-(-144)} }{12} \\= \frac{-8+-\sqrt{208} }{12} \\ = \frac{-8+\sqrt{208} }{12} or \frac{-8-\sqrt{208} }{12}\\= 0.53518375848 or -1.86851709182\\= approximately -1.87, 0.54

8 0
1 year ago
John and Liz are sharing a large pizza. John ate of the pizza, and Liz ate of the pizza. How much of the pizza is left?
Aloiza [94]
Add what they ate
2/3 + 1/4 =
11/12
Then subtract that from the whole pizza
12/12 - 11/12 = 
1/12
1/12 of the pizza is left
Please mark as brainiest
6 0
3 years ago
Read 2 more answers
What is the value of (2/3)-4
Angelina_Jolie [31]

Answer:

16/81

Step-by-step explanation:

as there is (-) sign so when we multiply even negative numbers it becomes positive

8 0
3 years ago
Read 2 more answers
Please help, trigonometry is hard for me
Vsevolod [243]

Because the cos theta < 0 then theta must be an obtuse angle

so a^2 + b^2 < a^2

C

6 0
3 years ago
Claire buys a jacket that originally cost $76. The price is marked down 25% for a sale, and Claire has a coupon to further reduc
Vika [28.1K]

Answer:

$51.30

Step-by-step explanation:

First, we find 25% of the original price, then we deduct that from the original price. Then, we find 10% of the price and deduct that also.

The original price is $76.

25% of $76 is:

\frac{25}{100} * 76 = $19

We deduct $19 from $76:

76 - 19 = $57

We find 10% of $57:

\frac{10}{100} * 57 = $5.7

Deducting this:

57 - 5.7 = $51.30

She will pay $51.30 for the jacket.

5 0
3 years ago
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