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Phantasy [73]
3 years ago
5

The process used to solve proportions is:

Mathematics
2 answers:
Elina [12.6K]3 years ago
8 0
OK......
I believe your answer would be 
B. Cross-Multiplication 

H0P3 It H3LPS :)
Afina-wow [57]3 years ago
6 0
The correct answer is b
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Solution to the system of equation -6x+y=-3 and 7x-y=3​
djverab [1.8K]

Answer:

X = 0

Y = -3

Step-by-step explanation:

In this situation you would choose elimination.

-6x+y=-3

7x-y=3

---------------

x = 0

plug back in to find y

(-6)(0) + y = -3

0 + y = -3

y = -3

plug in to other equation for double check

7(0) - (-3) = 3

0 + 3 = 3

3 = 3

Hope this helps

3 0
2 years ago
Captain Salamander has a lazy time on the trip and spends about 15 hours a day sleeping. What fraction of the day does he spend
padilas [110]

Well there is 24 hours in a day so 24 - 15 = 9. So he spends 9 hours awake.

7 0
2 years ago
Yall can u please help me this is a grade i really need All answers before<br> 9:30
il63 [147K]

Answer:

Step-by-step explanation:

11: 16

12: 43.2

13: 1/18

3 0
2 years ago
Use the identity (x+y)(x−y)=x2−y2 to find the difference of two numbers if the sum of the numbers is 12 and the difference of th
Natalka [10]

Answer:

The difference of two numbers using identity (x+y)(x-y)=x^2-y^2 is 4.

Step-by-step explanation:

Given:  The sum of the numbers is 12 and the difference of the squares of the numbers is 48.

To find the difference of two numbers using identity (x+y)(x-y)=x^2-y^2

Let the two numbers be a and b, then

Given that the sum of the numbers is 12

that is a + b = 12 .........(1)

Also, given the difference of the squares of the numbers is 48.

that is a^2-b^2=48     ..........(2)

Using given identity  (x+y)(x-y)=x^2-y^2

We have (a+b)(a-b)=a^2-b^2

Substitute the known values, we have,

12(a-b)=48

Divide both side 12 , we have,

(a-b)=4

Thus, the difference of two numbers using identity (x+y)(x-y)=x^2-y^2 is 4.

8 0
3 years ago
Read 2 more answers
In a certain​ chemical, the ratio of zinc to copper is 4 to 15. A jar of the chemical contains 750 of copper. How many grams of
nataly862011 [7]

Answer: it contains 200 grams of zinc.

Step-by-step explanation:

Ratio of zinc to copper is 4 to 15 = 4;15

Total ratio = 4+15= 19

We first find amount of both zinc and copper( the whole chemical)  which is equal to

ratio of copper / total ratio  x (the entire chemical--total grams of zinc and copper) =amount of copper

15/19 x X = 750

X= 750 X 19 / 15= 950 grams

To find amount of zinc in the chemical = ratio of zinc / total ratio x total amount of chemical

=4/19 x 950

=200 grams

3 0
2 years ago
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