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3 years ago

What is the solution to the system of equations

Mathematics

2 answers:

kondor19780726 [428]3 years ago

6 0

Answer:

lg study ng lucky sly we its go cu u such

Gnesinka [82]3 years ago

5 0

Answer: x=-4, y=-7

Problem:
4x-6y = 26
5x-4y=8

You can use substitution or elimination to solve the problem. I’m going to use elimination.

Multiply by -2 => -8x+12y = -52
Multiply by 3 => 15x- 12y = 24

Add those equations together:
7x=-28
x=-4
Plug that into one of the original equations to get y.

4(-4)-6y=26
-16 - 6y=26
-6y=42
y=-7

Check for the other equation to see if this is true. Which in this case it is. So that’s your answer. x=-4, y=-7

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You and two friends visit a pizza shop. There are 14 toppings. 7 toppings are meat and the rest are vegetable. Each of you order

Oksi-84 [34.3K]

Probbality=desired outcomes/total possible outcomes

so you and 2 friends makes 3 people
you each order a differnt topping

so

7/14 or 1/2 of them are meat on first try
then, 1 less topping, so 6/14 or 3/7 are meat for 2nd peson
then 1 less topping so 5/14 are meat for 3rd person

1/2 times 3/7 times 5/14=15/196
probablity will be 15/196 or about 7.65%

7 0

3 years ago

HELP ASAP! Due in 20 mins

Vadim26 [7]

Answer:

Step-by-step explanation

Why does C work:

You can calculate the rate of change by subtracting 12 from Distance Traveled = 1, from 12.75 from Distance Traveled = 2 to find the difference of 0.75.

Because the multiple-choice only offers fractions you can check if .75 is correct by converting it into a fraction. This is true, 0.75 is equal to 3/4.

Now that you know the rate of change you need to find the initial value which would be Distance Traveled = 0 and Time = __. To find this you subtract 0.75 from 12 which would give you 11.25.

C. y = 3/4(0.75) + 11.25

3 0

3 years ago

Suppose you flip a fair coin N times. Let random variable h be the number of heads that occur. Use the normal approximation to e

Mariana [72]

Answer:

If n = 1000000, then

$P(h E [495000, 505000]) = \int\limits^{50500}_{495000} {\frac{2}{\sqrt{2000000\pi}} e^{\frac{-(k-500000)^2}{500000} }} \, dk$

If n = 10400, then

$P(h E [495000, 505000]) = \int\limits^{50500}_{495000} {\frac{2}{\sqrt{2000000\pi}} e^{\frac{-(k-500000)^2}{500000} }} \, dk$

If N = 102, then

$P(h < 40 or h > 60) = 1-P(40$

Step-by-step explanation:

Since the coin is fair, then the probability that a filp is heads is 1/2. Given N tries, the amount of heads can be approximated with a Normal distribution with mean μ = N *1/2 = N/2 and standard deviation σ = √(N*1/2 * 1/2) = √N/ 2

The density function of that random variable is given by de following formula

$f_X(k) = \frac{1}{\sqrt{2\pi} * \sigma} e^{\frac{-(k-\mu)^2}{2\sigma^2} } = \frac{2}{\sqrt{2\pi N}} e^{\frac{-2(k-N/2)^2}{N} }$

If n = 1000000, then

$P(h E [495000, 505000]) = \int\limits^{50500}_{495000} {\frac{2}{\sqrt{2000000\pi}} e^{\frac{-(k-500000)^2}{500000} }} \, dk$

If n = 10400, then

$P(h E [495000, 505000]) = \int\limits^{50500}_{495000} {\frac{2}{\sqrt{2000000\pi}} e^{\frac{-(k-500000)^2}{500000} }} \, dk$

If N = 102, then

$P(h < 40 or h > 60) = 1-P(40$

4 0

3 years ago

PLEASEE HELLPPPPP<br><br> ........................................

anygoal [31]

Answer:

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Margaret is making strawberry milkshakes for the kids party. The recipe calls for 1/3 of a cup of strawberry syrup to make 12 mi

zysi [14]

Answer:

12 milkshake can be made by 1/3 cup

1 milkshake can be made by (1/3)/12 cup

72 milkshake can be made by ((1/3)/12)*72 cup = 2cup

Step-by-step explanation:

7 0

3 years ago