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motikmotik
4 years ago
12

Use the elimination method to solve the system of equations. Choose the correct ordered pair. 

Mathematics
2 answers:
vfiekz [6]4 years ago
7 0
Correct answer is (d) (3,4)
defon4 years ago
6 0
Just add the equations in order to eliminate y, 
19x = 57
x = 57/19
x = 3

Substitute it in equation 1, 
10(3) - 8y = -2
-8y = -2 - 30
y = -32/-8
y = 4

In short, Your Answer would be Option D) (3,4)

Hope this helps!
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7:x=2:3<br> Solve the equation
g100num [7]

Answer:

10.5 =x

Step-by-step explanation:

We can rewrite this as a ratio

7          2

---- = ------

x         3

Using cross products

7*3 = 2x

Divide each side by 2

21 /2 = 2x/2

10.5 =x

8 0
3 years ago
10 children in kindergarten class any dog 14 children in the class do not own a dog find the ratio of the number of children tha
dlinn [17]
Given that there are 10 children who own a dog, and 14 children who do not, the ratio of the children that owns a dog to the children that do not own a dog, is 10:14.

To express the ratio in a simplify fraction, we will just use fractional notation.  Thus, it is simply 10/14, or 5/7 as its simplest form.
5 0
3 years ago
Read 2 more answers
Given: tangent A = negative StartRoot 15 EndRoot What is the value of Tangent (A minus StartFraction pi over 4 EndFraction)?
marshall27 [118]

Answer:

( √15 + 8)/7

Step-by-step explanation:

TanA = -√15

.we are to find tan(A-π/4).

In trigonometry

Tan(A-B) = TanA - TanB/1+ tanAtanB

Hence:

tan(A-π/4) = TanA - Tanπ/4/1+ tanAtanπ/4

Substitute tan A value into the formula

tan(A-π/4) = -√15-tanπ/4 / 1+(-√15)(tanπ/4

tan(A-π/4) = -√15-1/1-√15

Rationalize

-√15-1/1-√15 × 1+√15/1+√15

= -√15-√225-1-√15/(1-√225)

= -2√15-15-1/1-15

= -2√15 -16/(-14)

= -2(√15+8)/-14

= √15 + 8/7

Hence the required value is ( √15 + 8)/7

4 0
3 years ago
Read 2 more answers
If you could help me with these questions I would appreciate it!
Dominik [7]

Answer:

So if we count all of the different squares we get that there are 36 squares aka 6*6. So no we need to get how many of the squares add up to greater than 8. Those would be 10/36. 10 of them are greater than 8. So we simplify and we get 5/18. 5/18 is the answer. Hope this helped

<h2><u>5/18</u></h2>

7 0
3 years ago
What is the number word of this 717,700,500
Alex17521 [72]

Seven-Hundred and Seventeen-Million, Seven-Hundred Thousand, and Five-Hundred.

7 0
4 years ago
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