<u>Answer</u>:
x = 7, y = 2
<u>Explanation</u>:
equations given:
x + 7y = 21
x + 4y = 15
make "x" the subject:
x + 7y = 21
x = 21 - 7y .........equation 1
x + 4y = 15
x = 15 - 4y .......equation 2
Solving both the equations simultaneously:
15 - 4y = 21 - 7y
-4y + 7y = 21 - 15
3y = 6
y = 6 ÷ 3
y = 2
If y is 2
Then x = 21 -7y;
x = 21 - 7(2)
x = 21 - 14
x = 7
In all of these cases, y=x+2.
Answers:
<em>See below.</em>
Step-by-step explanations:
(A) This equation evaluates the cost to ship 100 lbs of wheat, which equals $130:
C(100) = 1.28(100) + 2
C(100) = 128 + 2
C(100) = 130
(B) The cost to ship 250 lbs of wheat would be $322:
C(250) = 1.28(250) + 2
C(250) = 320 + 2
C(250) = 322
(C) If you had $50, you could ship 37.5 lb of wheat:
C(x) = 50
C(x) = 48 + 2
C(x) = 1.28(37.5) + 2
Probability is expressed as
number of favourable outcomes/total number of possible outcomes
Looking at the given scenario, the number os students that earned a grade of A is 5. Since we are concerned with these students, then, the number of favourable outcomes is 5.
The total number of students for all grades is 35. This means that the total number of possible outcomes is 35
Thus, the probability that a student earns a grade of A is
5/35
= 0.14
Answer:
1) the length of your shadow and the length of the shadow cast by the Washington Monument
2) 14.4 feet
3) BC=2.7, XZ=10.5
Step-by-step explanation:
just too the quiz