Answer:
AOB = 40 degrees
Step-by-step explanation:
The two smaller angles, AOB and BOC, add up to form AOC. That means that the angles of AOB and BOC sum up to the angle of AOC
The answer is 240.5 hope you get the question
Answer:
Put the equation in standard form by bringing the 4x + 1 to the left side.
7x2 - 4x - 1 = 0
We use the discriminant to determine the nature of the roots of a quadratic equation. The discriminant is the expression underneath the radical in the quadratic formula: b2 - 4ac.
b2 - 4ac In this case, a = 7, b = -4, and c = -1
(-4)2 - 4(7)(-1)
16 + 28 = 44
Now here are the rules for determining the nature of the roots:
(1) If the discriminant = 0, then there is one real root (this omits the ± from the quadratic formula, leaving only one possible solution)
(2) If the discriminant > 0, then there are two real roots (this keeps the ±, giving you two solutions)
(3) If the discriminant < 0, then there are two imaginary roots (this means there is a negative under the radical, making the solutions imaginary)
44 > 0, so there are two real roots
<span>Find the place value you want (the "rounding digit") and look to the digit just to the right of it.<span>If
that digit is less than 5, do not change the "rounding digit" but
change all digits to the right of the "rounding digit" to zero. hope this helps</span></span>
Answer:
95%
Step-by-step explanation:
Let the proportion who can swim be denoted by P(S) while the proportion that can whistle be denoted by P(W)
The proportion that can swim and whistle will be P(S and W)
The proportion that can swim or whistle will be P(S or W)
To get the proportion that can swim or whistle will be P(S or W), we use
P(S or W)=P(S)+P(W)-P(S and W)
Given that P(W) is 70%, P(S) is 80% and P(S andW) is 55% then
P(S or W)=80%+70%-55%=95%