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Leto [7]
3 years ago
5

What is the solution to the system of equations? 5x-3y=-9 2x-5y=4 (___,___)

Mathematics
1 answer:
djverab [1.8K]3 years ago
4 0
\left \{ {{5x-3y=-9\ \ | *(-2)} \atop {2x-5y=4\ \ | *5}} \right. \\\\ \left \{ {{-10x+6y=18} \atop {10x-25y=20}} \right. \\\\+---\\addition\ method\\\\
-19y=38\ \ \ | divide\ by\ -19\\
y=-2\\\\2x=4+5y\ \ \ | divide\ by\ 2\\\\
x=\frac{4+5y}{2}=\frac{4+5*(-2)}{2}=\frac{4-10}{2}=\frac{-6}{2}=-3\\\\Solution:\\ \left \{ {{y=-2} \atop {x=-3}} \right.
You might be interested in
3
ValentinkaMS [17]

Answer:

P = 58

Step-by-step explanation:

<em>The image if the circle and triangle can be found online</em>

Given

JA = 8

AL = 8

CK = 10

Required

The perimeter of JKL

Since the mid-points of the tangents are A, B and C respectively.

JK = JB + BK

Where

JB = JA = 8

BK = CK = 10

So:

JK =8+10 =18

JL = JA + AL

JL = 8+11 = 19

KL = CL + CK

Where

CL  =AL = 11

So:

KL = 11+10 = 21

So, the perimeter (P) is:

P = JK+ KL +JL

P = 18 + 19 + 21

P = 58

4 0
3 years ago
Two triangles can be formed with the given information. Use the Law of Sines to solve the triangles. A = 56°, a = 16, b = 17 (5
Blizzard [7]

Answer:

B = 61.75°

Step-by-step explanation:

The formula for the Law of Sines is given as:

a/ sin A = b/ sin B

In the question, we are given the following values

A = 56°, a = 16, b = 17

We are to solve for B

Hence,

16/ sin 56° = 17/sin B

Cross Multiply

sin B × 16 = sin 56° × 17

sin B = sin 56° × 17/16

sin B = 0.88

B = arc sin(0.88)

B = 61.74536°

Approximately B = 61.75°

7 0
3 years ago
Select the correct answer.
Mazyrski [523]

Answer:

i think correct answer is a

4 0
3 years ago
If f(1) = 10 and f(n) = f(n-1) + 3 then find the value of f(6).
chubhunter [2.5K]

Answer:

7

Step-by-step explanation:

3 0
3 years ago
If x2 = 10, what is the value of x?
JulsSmile [24]
If you mean x^2 then there would be no answer after all, 3^2= 9 and 4^2= 16 so

If you mean 2x then the answer would be 5

Hope I helped?
7 0
3 years ago
Read 2 more answers
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