What are all the functions that have no real number solution

4x^2+100=0

3x^2-9=0

x^2+1=0

6x^2-216=0

x^2-49=0

Which expression is equivalent to 36a-27 A. 9 {4a-3} B. 3 {18a-p} C. 9 {4a-27} D. 3 {12a-6} (͡° ͜ʖ ͡°)

In a pond, lotus flower multiply its self after every 4 days. One lotus multiplies into two after four days, into 4 after 8 days, into 8 after 16 days and so on.

The amount of gas that a helicopter uses is directly proportional to the number of hours spent flying. the helicopter flies for 22 hours and uses 1616 gallons of fuel. find the number of gallons of fuel that the helicopter uses to fly for 44 hours.

Rachel rounded 16,473 to the nearest hundred then she rounded it to the nearest thousand what is the final number

1+1+1+1+1 1+1+1+1+1 1+1*0+1=

Translate the sentence into an equation. Two less than the product of 5 and a number is equal to 6. Use the variable w for the unknown number.

You fly in a helicopter for 20 minutes that goes at a speed of 240 kilometers per hour how far did you go?

A central angle with a measure of 60 degrees is drawn in a circle with a circumference of 8π. What is the length of the intercepted arc in terms of pi?

Round 38.49 to the nearest whole number

A laboratory technician needs to make a 63-liter batch of a 20% acid solution How can the laboratory technician combine a batch of an acid solution that is pure acid with another that is 10% to get the desired concentration?