Scientific Notation & Solving Equations

Presentation

•

Mathematics

•

8th Grade

•

Hard

Lindsey Williams

FREE Resource

4 Slides • 6 Questions

Scientific Notation & Solving a System of Two Linear Equations

Scientific Notation

Used to write really big and really small numbers.
The first part is a number between 1 and 10. The second part is 10 raised to a power. Ex:5.5 x 10¹⁵
Use your calculators :)

Multiple Choice

Multiply:
(1.4 x 10⁵)(2 x 10⁷)

2.8 x 10³⁵

2.4 x 10¹²

2.8 x 10¹²

Multiple Choice

The mass of the sun is 1.989 x 10³⁰ kilograms. The mass of the earth is 5.98 x 10²⁴ kilograms. How many times bigger is the sun than the earth?

3.326 x 10⁵

3.326 x 10⁶

1.99 x 10³⁰

1.99 x 10⁶

Multiple Choice

The mean distance from the sun to Earth is 9.29 x 10⁷ miles. Jupiter's mean distance from the sun is 4.8388 x 10⁸ miles. What is the difference between these two distances in miles?

4.3092 x 10¹

3.9098 x 10⁷

3.9098 x 10⁸

5.7678 x 10⁸

Solving a Sytem of Linear Equations

Graph the lines
Find where they intersect.

Graphing Systems of Linear Equations using Desmos

https://www.youtube.com/watch?v=q5cOaKNToN8

Multiple Choice

What is the solution to the system of linear equations?

(2, 5)

(3, 3)

(-3, -3)

(-2, -1)

Multiple Choice

Solve the system of linear equations by substitution.

y\ =\ -2x+5

3x+5y=18

(1, 3)

(6, 3)

(-5, 0)

(2, 7)

Multiple Choice

A large pizza at Palanzio’s Pizzeria costs $6.80 plus $0.90 for each topping. The cost of a large cheese pizza at Guido’s Pizza is $7.30 plus $0.65 for each topping. Which system of equations could be used to find the number of toppings when both companies cost the same amount?

y = 6.80 + .65x
y=7.30+.90x

x + y = 6.80
x + y = 7.30

y = 6.80+.90x
y = 7.30 + .65x

y + .90x = 6.80
y + .65x = 7.30

Scientific Notation & Solving a System of Two Linear Equations

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