Answer:
c = -25
Step-by-step explanation:
Multiply the denominator by -7 on both sides, you would then get the equation c + 32 = 7 in which the -7 on the left side cancels out. Subtract 32 on both sides to get the c value which is -25.
Answer:
Slope: 1.75
Step-by-step explanation:
Slope = (3-10) / (0-4)
= -7 / -4
= 1.75
Answer:
The box of 10 for $10.88 is better.
Step-by-step explanation:
10.88/10=$1.08
17.62/14=$1.26
Answer:
PR = 39 cm
Step-by-step explanation:
Using Pythagoras' identity in the right triangle
PR² + PQ² = QR² , that is
PR² + 80² = 89²
PR² + 6400 = 7921 ( subtract 6400 from both sides )
PR² = 1521 ( take the square root of both sides )
PR = 
= 39
Answer:
we have
Cos (a+b)=Cos aCosb-SinaSinb
for
Cos (a+a)=Cos aCosa-SinaSina=<u>Cos²a-Sin²a</u>
is a required answer.
