Answer:
69 grams
Step-by-step explanation:
In a certain chemical, the ratio of zinc to copper is 3 to 13. A jar of the chemical contains 299 grams of copper. How many grams of zinc does it contain?
From the question, we know:
Zinc : Copper
3 : 13
We are told that : A jar of the chemical contains 299 grams of copper.
The grams of zinc it contains is:
3/13 = x/299
Cross Multiply
13 x = 3 × 299
x = 3 × 299/13
x = 897/13
x = 69 grams
It contained 69 grams of zinc
Answer:
Step-by-step explanation:
a. the equation represents the situation because Roberto payed $200 and the total cost of the recliner was 400, so Roberto pays it off $20 a month until Roberto pays the full $400
b. It will take Roberto 5 months to pay off the recliner.
next question
a. 3x+4=25
b. the number Hal was thinking of is 7; 3x+4-4=25-4; 3x/3=21/3; x=7
Answer:
x^2 -11x+28
Step-by-step explanation:
See Image below. I hoped this helped :)
