Question is on the picture/screenshot

127

Step-by-step explanation:

(19-7)^2

(12)^2

=144

144-8×3+4×3-5

8×3=24

4×3=12

144-24+12-5

144+12-24-5

127

hope this helps

127

Step-by-step explanation:

Following the Order of Operations, we should subtract 19 - 7 = 12

Then, you do the exponents so, 12 * 12 = 144.

Next, multiply. 8 * 3 = 24 and 4 * 3 = 12

So your equation should look like this. 144 - 24 + 12 - 5

Now from left to right you solve it so, 144 - 24 = 120

144 - 24 = 120

120 + 12 = 132

132 - 5 = 127

Have a wonderful day!

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

12.4, 12.387, 12.26, 12.252, 6.241, 6.2, 6.015, 6.009, 1.411, 1.2, 1.056, 1.007, 0.31,   0.13, 0.5, 0.04

step-by-step explanation:

ur welcome : )