Answer:
90
Step-by-step explanation:
Let x be Dany's score in geography. His score in chemistry is double his score in geography and it is equal to
2 x
The average of all four scores is 79. Hence
(93 + 88 + x + 2 x) / 4 = 79
Multiply both sides of the equation by 4
4×(93 + 88 + x + 2 x) / 4 = 4×79
Simplify
93 + 88 + x + 2 x = 316
Group like terms
3 x + 181 = 316
Solve for x
3 x = 135
3 x / 3 = 135 / 3
x = 45
score in geography = x = 45
score in chemistry = 2 x = 2 × 45 = 90
Hope it helped u if yes mark me BRAINLIEST!
Tysm!
This is 2/21. You can simplify the 4 in -4/7 to 2 and the 6 in -1/6 to 3. So it would now be -2/7 times -1/3. A negative times a negative is a positive, so the answer will be positive. 1 times 2 is 2 and 7 times 3 is 21. 2/21
J. 5a + 8 I think
I just added everything together
Volume of a box (rectangular prism) should be length x width x height. Since you're given the values...
What's 2 1/2 x 1 1/2 x 4? That should give you your volume.