Let x be the number so that the equation is:

\(x−15=7\)

Solve for x. Add 15 to both sides:

\(x−15+15=7+15\)

\(x=22\)

So, the number is 22.

Question

asked 2021-04-13

To find:

The smallest the smallest positive integer such that if we divide it by two, three and four, the remainder is one but seven divides the number evenly.

The smallest the smallest positive integer such that if we divide it by two, three and four, the remainder is one but seven divides the number evenly.

asked 2021-03-25

A skier wears a jacket filled with goose down that is 15mmthick. Another skier wears a wool sweater that is 5.0mmthick. Both have the same surface area. Assuming thetemperature difference between the inner and outer surfaces of eachgarment is the same, calculate the ratio (wool./goose down) of theheat lost due to conduction during the same time interval.

asked 2021-03-30

A potential difference of 480V is established between largeparallel, metal plates. Let the potential of one plate be 480V andthe other be 0V. The plates are separated by d = 1.70cm.

a) Sketch the equipotential surfaces that correspond to 0, 120,240, 360, and 480 V.

b) In your sketch, show the electric field lines. Does yoursketch confirm that the field lines and surfaces are mutually perpendicular?

a) Sketch the equipotential surfaces that correspond to 0, 120,240, 360, and 480 V.

b) In your sketch, show the electric field lines. Does yoursketch confirm that the field lines and surfaces are mutually perpendicular?

asked 2021-05-12

An electron is fired at a speed of \(\displaystyle{v}_{{0}}={5.6}\times{10}^{{6}}\) m/s and at an angle of \(\displaystyle\theta_{{0}}=–{45}^{\circ}\) between two parallel conductingplates that are D=2.0 mm apart, as in Figure. Ifthe potential difference between the plates is \(\displaystyle\triangle{V}={100}\ {V}\), determine (a) how close d the electron will get to the bottom plate and (b) where the electron will strike the top plate.

asked 2020-11-26

Airlines schedule about 5.5 hours of flying time for an A320 Airbus to fly from Dulles International Airport near Washington, D.C., to Los Angeles International Airport. Airlines schedule about 4.5 hours of flying time for the reverse direction. The distance between these airports is about 2,300 miles. They allow about 0.4 hour for takeoff and landing.

a. From this information, estimate (to the nearest 5 mph) the average wind speed the airlines assume in making their schedule.

b. What average airplane speed (to the nearest 5 mph) do the airlines assume in making their schedule?

a. From this information, estimate (to the nearest 5 mph) the average wind speed the airlines assume in making their schedule.

b. What average airplane speed (to the nearest 5 mph) do the airlines assume in making their schedule?

asked 2020-12-14

Two minor league baseball players got a total of 366 hits. Washington had 12 more hits than Sanchez. Find the number of hits for each player.
Washington had 195 hits. Sanchez had 171 hits.

asked 2021-03-23

What is the potential difference between \(\displaystyle{y}_{{i}}=-{5}\) cm and \(\displaystyle{y}_{{f}}={5}\) cm in the iniform electric field \(\displaystyle\vec{{{E}}}={\left({20},{000}\hat{{{i}}}-{50},{000}\hat{{{j}}}\right)}\frac{{V}}{{m}}\)?

asked 2021-03-02

The cost in dollars to produce x youth baseball caps is C(x) = 4.3x + 75. The revenue in dollars from sales of x caps is \(\displaystyle{R}{\left({x}\right)}={25}{x}\).

(a) Write and simplify a function P that gives profit in terms of x.

(b) Find the profit if 50 caps are produced and sold.

(a) Write and simplify a function P that gives profit in terms of x.

(b) Find the profit if 50 caps are produced and sold.

asked 2020-11-26

A triangle har a perimetr of 239cm. If the 2nd side is thrice the length of the 1st side and the 3rd side is 6 less than the 2nd side. Find the length of all sides.
1st side =

asked 2021-04-24

A force of 250 N is applied to a hydraulic jack piston that is0.01 m in diameter. If the piston which supports the load hasa diameter of 0.10 m, approximately how much mass can belifted. Ignore any difference in height between thepistons.