Answer:
T = 290
Step-by-step explanation:
We can find the sum of all observations multiplying sample size (n) by sample mean (x).
Sum of all observations in the data set is,
Hope this helps!
Answer:
2. 4a+2c = 5000
4. a + c = 1600
Step-by-step explanation:
Answer:
24
Step-by-step explanation:
Let the number of mangoes owned by Tulsa be T and that by Julie be J
If Tulsa has 4 times as many mangoes as Julie then
T = 4J
Tulsa bought 6 more mangoes. She now has 5 time as many mangoes as Julie
T + 6 = 5J
Solve both equations simultaneously by substitution
4J + 6 = 5J
Collect like terms
6 = 5J- 4J
J = 6
Since
T = 4J
T = 4 * 6
= 24
Hence Tulsa had 24 mangoes at first
Answer: 
Step-by-step explanation:
Distribute the negative sign. This basically changes all the signs inside the parentheses.
Combine like terms;
Answer:
-18v - 16
Step-by-step explanation:
6(2 - 7v) - 4(-6v + 7)
= 6×2 - 6×7v - 4×(-6v) -4×7
= 12 - 42v + 24v - 28
= -18v - 16
