
For the first one, you take the original temprature -3.0° and add -5.4° which gives you an answer of -8.4°c :)

for the second you add the amount for breakfast and lunch, then multiply by 7 days
7.24/7=1.04
7.00/7= 1 0.24/7= .04 1+0.04=1.04
11.4/19= 0.6
https://www.calculatorsoup.com/calculators/math/longdivisiondecimals.php?dvsor=19&dvdnd=11.4&decimal...
Kinda hard to show work for second one so posted a link.
6 1/4 = z + 1 5/8
6 1/4 - 1 5/8 = z + 1 5/8 - 1 5/8 Isolate variable
6 2/8 - 1 5/8 = z Least common denominator
4 5/8 = z Simplify
Answer:
Step-by-step explanation:
Use Pythagorean theorem,
d² = 4² + 4²
= 16 + 16
d² = 32
d = √32
d = 5.67 units
Am not sure but i think its 9m^4-49n^6 hope it helps :)