Roberto wrote a sentence that describes an equation.

Mathematics

2 answers:

ryzh [129]3 years ago

5 0

Answer:

x/2=45; x = 90

Step-by-step explanation:

tresset_1 [31]3 years ago

3 0

The last one: x/2=45; x = 90
the problem says: half of a number is 45.

let's use x to represent this number
we know that dividing by 2 halves a number, so, x/2 = 45

to get x alone, we multiply 2 by 2 to cancel it out. so, multiply by 2 on both sides

x/2 • 2 = 45 • 2

x = 90

hope this helped!

You might be interested in

A random sample of ten professional athletes produced the following data where x is the number of endorsements the player has an

lukranit [14]

ŷ= 1.795x +2.195 is the equation for the line of best fit for the data

<h3>How to use regression to find the equation for the line of best fit?</h3>

Consider the table in the image attached:

∑x = 29, ∑y = 74, ∑x²= 125, ∑xy = 288, n = 10 (number data points)

The linear regression equation is of the form:

ŷ = ax + b

where a and b are the slope and y-intercept respectively

a = ( n∑xy -(∑x)(∑y) ) / ( n∑x² - (∑x)² )

a = (10×288 - 29×74) / ( 10×125-29² )