Write an expression to the representative the sum of three times the square of the number and -7 In your expression, what is the value of the constant

Explanation:

Let the unknown number be x.

Three times the square of the number is expressed as;

= 3 * x²

=  3x²

The sum of the resulting expression (3x) and -7 is equivalent to;

= 3x² + (-7)

= 3x² - 7

Hence the mathematical expression of the statement 'the sum of three times the square of the number and -7' is 3x² - 7.

A constant is a value with no variable attached. It  is always standing alone as a number in a an expression. The degree of a constant is zero. According to the resulting expression, the value of the constant in the expression is -7

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

ed brushes his teeth

explanation: