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taurus [48]
4 years ago
8

Please hurry! I'll give brainliest for correct answer!

Mathematics
2 answers:
igomit [66]4 years ago
4 0
3x + 2y = 13
⇒ 2y = 13 - 3x
⇒ y = 1/2 (13-3x)

We know bot x and y are integers. So
if x = 1, y = 5  ---------------first solution
if x = 2, y = 3.5  -------------not a solution
if x=3, y = 2  ----------------second solution.

Since we need only one answer, y = 2

Hope it helps!
Aloiza [94]4 years ago
3 0
3x - 2y = 13
3x - (2y/2) = (13/2)
3x - y = 6.5
(3x/3) - y = (6.5/3)
x - y = 2.16
(x-x) - y = (2.16 - x)
-y = 2.16 - x
(-y/-1) = (2.16/-1) -x

y = -2.16 - x

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0.6 would be the slope
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3 years ago
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1/2x + 3 = 2/3x + 1....multiply everything by the common denominator of 6
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multiplying by the common denominator will get rid of the fractions
6 0
4 years ago
Read 2 more answers
In a certain​ year, brand A of​ heart-rate watch cost ​$39.99 and brand B cost ​$59.99. A nonprofit community health organizatio
Oksi-84 [34.3K]

Answer:

Brand A = 21 heart-rate watches.

Brand B = 13 heart-rate watches.

Step-by-step explanation:

Let A be the number of Brand A heart watches and B be the number of Brand B heart watches.

We have been given that a nonprofit community health organization purchased 34 ​heart-rate watches for use at a wellness center.

We can represent this information in an equation as:

A+B=34...(1)

We have been given that in a certain​ year, brand A of​ heart-rate watch cost ​$39.99 and brand B cost ​$59.99 and the organization spent ​$1619.66 for the​ watches.

We can represent this information in an equation as:

39.99*A+59.99*B=1619.66...(2)

We will use substitution method to solve our system of equations.

From equation (1) we will get,

A=34-B

Substituting A=34-B in equation(2) we will get,

39.99*(34-B)+59.99*B=1619.66

1359.66-39.99*B+59.99*B=1619.66

-39.99*B+59.99*B=1619.66-1359.66

20*B=260

B=\frac{260}{20}

B=13

Therefore, the organisation purchased 13 heart-rate watches of brand B.

Now let us substitute B=13 in equation (1).

A+13=34

A+13-13=34-13

A=21

Therefore, the organisation purchased 21 heart-rate watches of brand A.

8 0
3 years ago
4 2/3 - (-1 4/5) (by the way 4/5 is a fraction)
Free_Kalibri [48]

Answer: 6

Step-by-step explanation:

Eliminate the negative and change the operation.

4 + 1

Rewrite equation with parts separated

4 + + 1 +

Add whole numbers

4 + 1 = 5

Solve fraction

+ = ??

Find LCD of and . LCD = 15

+ =

Simplify fraction

= 1

Combine whole number and fraction

5 + 1 + = 6

4 0
3 years ago
I have absolutely no idea what’s going on
MA_775_DIABLO [31]

Answer:

The hypotenuse( longer side) of the triangle = c^{2} = a^{2} +b^{2} \\Therfore, c = \sqrt a^{2} +b{2}\\ \\

Step-by-step explanation:

Here, side =c

Therfore, area = c *c

That is a^{2} +b{2} = 50^{2} + 35^{2} = 3250 = 57 units sq

8 0
3 years ago
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