Answer:
x=5
Step-by-step explanation:
23-3= 4x or 20
that means 4x is equal to 20
20 divided by 4 is 5
so x is equal to 5
Let x be the score of the 3rd quiz,, then the average score will be:
(83+91+x)/3, which = (174+x)/3. but this average should be greater or equal to 85 and smaller or equal to 90:
85 ≤ (174+x)/3 ≤ 90
1st multiply all terms with 3 → 255 ≤(174+x) ≤ 270
2nd subtract 173 from all terms → 255-174 ≤174-174+x ≤270-174
81 ≤ x ≤ 96
Answer:
x = 6
Step-by-step explanation:
→ Rewrite equation
x + 3 = 9
→ Minus 3 from both sides
x = 6
Answer:
37
Step-by-step explanation:
9+4*7
9+28
37
Answer:
If the smallest two faces are not included, the surface area of the model will be 645 square mm
Step-by-step explanation: