Answer:
25
Step-by-step explanation:
20^2 + 15^ = c^2
400 + 225 = c^2
625 = c^2
25 = c
If you would like to solve 3 * x^2 + 24 * x = 27, you can do this using the following steps:
<span>3 * x^2 + 24 * x = 27
</span><span>3 * x^2 + 24 * x - 27 = 0
</span>3 * (x^2 + 8 * x - 9) = 0
x^2 + 8 * x - 9<span> = 0
</span>(x + 9) * (x - 1) = 0
1. x = - 9
2. x = 1
None of the above results is correct. The correct result would be {-9, 1}.
Answer:
0.51cm/s
Step-by-step explanation:
Area of a circle A = πr²
r is the radius
Rate of change of area is expressed as;
dA/dt = dA/dr • dr/dt
dA/dr = 2πr
radius r = 77cm
dA/dt = 79cm²
Get dr/dt
Substitute the given values into the formula
79 = 2π(77)•dr/dt
79 = 154dr/dt
dr/dt = 79/154
dr/dt = 0.51cm/s
Hence the rate of change of the radius is 0.51cm/s
Answer:
5/4×9/10
<u>5*9</u> = <u>45</u> <u>(divide by least common denominator)</u> = <u>9</u>
4*10 40 (divide by least common denominator) 8
Step-by-step explanation:
The least common denominator is 5
9. ( 1×10,000)+(5×1,000)+(4×100)+(9×1) ; fifteen thousand , four hundred - nine