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Ahat [919]
3 years ago
6

Answer asappppp please

Mathematics
1 answer:
AfilCa [17]3 years ago
5 0

it is the last option

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An alloy is composed of nickel, zinc, and copper in a ration of 7:2:9. How many kilograms of each metal are needed to make 3.6kg
motikmotik
Well, the short answer is, we divide that 3.6 by (7+2+9) and then we give as many pieces at the ratio to each, so let's do so,

\bf \stackrel{nickel}{7}~~:~~\stackrel{zinc}{2}~~:~~\stackrel{copper}{9}
\\\\\\
\stackrel{nickel}{7\cdot \frac{3.6}{7+2+9}}~~:~~\stackrel{zinc}{2\cdot \frac{3.6}{7+2+9}}~~:~~\stackrel{copper}{9\cdot \frac{3.6}{7+2+9}}
\\\\\\
\stackrel{nickel}{7\cdot 0.2}~~:~~\stackrel{zinc}{2\cdot 0.2}~~:~~\stackrel{copper}{9\cdot 0.2}
\\\\\\
\stackrel{nickel}{1.4}~~:~~\stackrel{zinc}{0.4}~~:~~\stackrel{copper}{1.8}
6 0
3 years ago
Read 2 more answers
Help? ill mark brainliest
iren [92.7K]

Answer:

In scientific notation itll be 1.5288e+14

Step-by-step explanation:

Multiply light year equation times how many light years vega is from earth (26)

6 0
3 years ago
What is the contrapositive of the conditional statement? If two variables are directly proportional, then their graph is a linea
sveticcg [70]
To find the contrapositive, you negate the hypothesis and the conclusion of the statement, and then switch their positions in the statement such that the conclusion becomes the hypothesis and vice versa:

If two variables are directly proportional, then their graph is a linear function. 

If two variables are not directly protional, then their graph is not a linear function.
6 0
4 years ago
​Vanessa has 40 gallons of water to her new fish pond in her backyard and wants to add more water. Her pond can hold a maximum o
hram777 [196]

Answer:

A) 24*m + 40 ≤ 256

B) She could leave the house running for at most 9 minutes

Step-by-step explanation:

The missing questions are:

<em>Part A. Create an inequality to represent the number of minutes, m, Vanessa could run the garden hose to add more water to the pond without adding the maximum amount in case of rain. </em>

<em> Part B. Select all the amounts of time, in minutes, that Vanessa could leave the house running.</em>

A) 48 gallons of water in 2 minutes is the same as 24 gallons per minute. Considering that her pond can hold a maximum of 256 gallons, it already has 40 gallons, and that the flow rate is 24 gallons per minute, the inequality is:

24*m + 40 ≤ 256

B)  Solving the previous equation:

24*m ≤ 256 - 40

m ≤ 216/24

m ≤ 9

8 0
4 years ago
Read 2 more answers
Why is 3+-5 equal to -2?
Svetach [21]

Answer:

3 + -5 = -2 because adding a negative is basically subtracting.

So 3 + -5 = 3 - 5 = -2

5 0
4 years ago
Read 2 more answers
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