Answer:
Step-by-step explanation:
X + y - Z=3 ------------------(I)
2y + 2z = 6 ------------------(II)
-2y - Z = -2 ------------------(III)
Multiply equation (III) by 2 and add equation (II) & (III)
(II) 2y + 2z = 6
(III)*2 <u>-4y - 2z = -4</u> {Now add and z will be eliminated}
-2y = 2
y = 2/-2
y = -1
Plugin y =-1 in equation (II)
2*(-1) + 2z = 6
-2 + 2z = 6
2z = 6 + 2
2z = 8
z = 8/2
z = 4
Plugin y = -1 & z = 4 in equation(I)
x - 1 - 4 = 3
x - 5 = 3
x = 3 + 5
x = 8
Answer:
$ 57.77
Step-by-step explanation:
6.625% --> .06625
872 x .06625
57.77 for tax
5-(8v+5) = -4(1+3v)
5-8v-5 = -4 - 12v
-8v = -4 - 12v
4v = -4
v = -1
Answer:
The probability they have one boy and one girl = 0.50 = 50 %
Step-by-step explanation:
Here the family has two children, we need to find what is the probability they have one boy and one girl.
Probability for babies are boys = 51.3% = 0.513
Probability for babies are girls = 1 - 0.513 = 0.487
The probability they have one boy and one girl = 1 - probability that they have two boys - probability that they have two girls
The probability they have one boy and one girl = 1 - 0.513² - 0.487² = 0.499 = 0.50
The probability they have one boy and one girl = 0.50 = 50%
The mean is the average so 180/50 = 3.6 therefor the mean of each donation from each sponsor is £3.60