A negative sign under a square root means that the root is a not a real number.
A negative sign outside a square root means we can "cover it" and evaluate the square root.
When the sign is outside, you can do the root first, then apply the sign. Not so if the sign is inside.
Thus, √-49 is not real and -√64 = -8.
The number of female contestants who signed up to compete is; 43.
<h3>What is the number of female contestants?</h3>
Let number of females = x
Let number of males = y.
Hence, it follows from the task content that;
x+y = 50
x-y = 36.
Hence, by adding both equations together in a bid to determine the number of females; we have;
2x = 86
x = 43.
Read more on simultaneous equation;
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Answer: for total order (T*7)+12= $40
for a single person = 1*7+12= $19
Step-by-step explanation:
T= number of tickets
also equals depending on scenario
T= 4 number of friends and himself
Answer:
Step-by-step explanation:
x²-4x-7=x²-4x+4+3=(x-2)²+3
put x-2=0,x=2
y=0+3=3
vertex is (2,3)
Answer:
<h2>
4, 7, 10, 13 and 16</h2>
Step-by-step explanation:
The nth term of an arithmetic sequence is expressed as 
.
a is the first term of the sequence
d is the common difference
n is the number of terms
Given the first term a = 4 and common difference d = 3, we can calculate the first five terms of the sequence using the formula.
If n = 2
The first five terms of the sequence from lowest to highest are 4, 7, 10, 13 and 16
