If 120g of copper are needed for a certain piece of brass, then the weight of the zinc that will be needed for the same piece is 80 grams.
A ratio expresses the number of times one number contains another. For example, if a dish of fruit contains eight oranges and six lemons, the orange-to-lemon ratio is eight to six. Similarly, the lemon to orange ratio is 6:8, while the orange to total fruit ratio is 8:14.
Given that Brass is an alloy made from copper and zinc in the ratio 3:2, based on weight. Therefore, the ratio of the metals can be written as,
Copper / Zinc = 3/2
Now, as the weight of the copper is 120grams. Therefore, the ratio can be written as,
Copper / zinc = 3/2
120 grams / zinc = 3/2
zinc = (120 grams × 2) / 3
zinc = 80 grams
Hence, If 120g of copper are needed for a certain piece of brass, then the weight of the zinc that will be needed for the same piece is 80 grams.
Learn more about Ratios here:
#SPJ2
B. 179187524.1
C.1.791875241e13
D. 1.92559524e-44
Answer:
C. 1.791875241e13
Step-by-step explanation:
We have that,
Amount of water flows over Niagara Falls per second = 5.67811×10⁵
Also, the number of seconds in a year = 3.15576×10⁷
Thus,
Liters of water that flows in a year = Amount of water that flows × Number of seconds
i.e. Liters of water = 5.67811 × 10⁵ × 3.15576 × 10⁷
i.e. Liters of water = 17.91875241 × 10¹²
i.e. Liters of water = 1.791875241 × 10¹³
Hence, the liters of water that flows through Niagara Falls each year is 1.791875241 × 10¹³ i.e. 1.791875241e13
Answer:
C-the one with e13
Step-by-step explanation: I just did it on i-ready and got it right. plz mark brainliest.
3.) r=2: 2+4/15= 6/15=2/5
2.) -3a-15=a: the fraction is negative. meaning the answer is negative, leaving a and c as choices. You can't square a since it is on different sides of the equation leaving you with c.
1.) answer is 5(x+4)=30: 3 is 2, meaning you would use the 2.
The equation in slope-intercept form of the line that passes through (-2,17) and (3,-13) is y = -6x + 5
It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.
If in the linear equation, one variable is present, then the equation is known as the linear equation in one variable.
We have two points:
(-2, 17) and (3, -13)
The equation is:
[y - (-13)] = (-13-17)/(3+2)[x-3]
y + 13 = -6(x - 3)
y = -6x + 18 - 13
y = -6x + 5
Thus, the equation in slope-intercept form of the line that passes through (-2,17) and (3,-13) is y = -6x + 5
Learn more about the linear equation here:
#SPJ2