Todd begins piano practice at 4:15 and ends at 5:50 how long is practice

Answers

Answer 1

Answer: 5:50-4:15=1 hour and 35 minutes.
HOPE I HELPED!!!

Answer 2

Answer: 1 hour and 35 minutes

A. x = 1

Step-by-step explanation:

$5^(7x-3)=625\n\n5^(7x-3)=5^4\iff7x-3=4\qquad\text{add 3 to both sides}\n\n7x=7\qquad\text{divide both sides by 7}\n\nx=1$

Answer:

X = 1

Step-by-step explanation:

Write a real world problem that can be solved using the equation, 5x = 3x + 20

Answers

-3x from both sides so it looks like 2x=20 and divide by 2 and x=10

a cereal box is 19 cm long 6 cm wide and 28 cm cm high. an artist is trying to create a design for the box. what is the surface area the artist needs to cover?

Answers

do 19 x 6 x 2 = 228
then 28 x 19 x 2 = 1064
then 28 x 6 x 2 = 336
then do 228 + 1064 + 336 = 1628

What is the solution to the system?-2x + y + 6z = 1
3x + 2y + 5z = 16
7x + 3y – 4z = 11

Answers

Answer:

x = 4, y = -2, z = 3

Step-by-step explanation:

$\left\{\begin{array}{ccc}-2x+y+6z=1&(1)\n3x+2y+5z=16&(2)\n7x+3y-4z=11&(3)\end{array}\right\n\n(1)\n-2x+y+6z=1\qquad\text{add}\ 2x\ \text{to both sides}\ny+6z=2x+1\qquad\text{subtract}\ 6z\ \text{from both sides}\ny=2x-6z+1\n\n\text{Substitute it to (2) and (3):}\n\n\left\{\begin{array}{ccc}3x+2(2x-6z+1)+5z=16\n7x+3(2x-6z+1)-4z=11\end{array}\right\qquad\text{use the distributive property}\n\n$

$\left\{\begin{array}{ccc}3x+4x-12z+2+5z=16&\text{subtract 2 from both sides}\n7x+6x-18z+3-4z=11&\text{subtract 3 from both sides}\end{array}\right\n\left\{\begin{array}{ccc}7x-7z=14&\text{divide both sides by 7}\n13x-22z=8\end{array}\right\n\left\{\begin{array}{ccc}x-z=2&\text{multiply both sides by (-13)}\n13x-22z=8\end{array}\right$

$\underline{+\left\{\begin{array}{ccc}-13x+13z=-26\n13x-22z=8\end{array}\right}\qquad\text{add both sides of the equations}\n.\qquad\qquad-9z=-18\qquad\text{divide both sides by (-2)}\n.\qquad\qquad \boxed{z=2}\n\n\text{Put it ot the equation}\ x-z=2:\nx-2=2\qquad\text{add 2 to both sides}\n\boxed{x=4}\n\n\text{Put the values of}\ x\ \text{and}\ z\ \text{to the equation}\ y=2x-6z+1:\n\ny=2(4)-6(2)+1\ny=8-12+1\n\boxed{y=-3}$