Firth grade * 0.8 Identify mistakes involving the order of operations JLJ
Tanvi tried to evaluate the expression 7 x [(19 - 1) = 2]. Here is her work:
7 x [(19 - 1) = 2]
= 7 x [18 - 2]
Step 1
= 7 X 9
Step 2
= 63
Step 3
Is Tanvi's work correct?
No, Tanvi made a mistake in Step 1. Tanvi subtracted before she multiplied.
The order of operations says to multiply before you subtract.
No, Tanvi made a mistake in Step 2. Tanvi divided before she multiplied. The
order of operations says to multiply before you divide.
Yes, Tanvi's work is corect.

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

1/2*qr*rs

step-by-step explanation: