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Georgia [21]
3 years ago
7

Solve the system of equations 3x + 4y = -23 x=3y+1

Mathematics
2 answers:
Ratling [72]3 years ago
7 0

Answer:

x= -5

y= -2

Step-by-step explanation:

3x + 4y = -23

3(3y + 1) + 4y = -23

9y + 3 + 4y = -23

13y = -26

y= -2

x= 3 * y + 1

x = 3 * (-2) + 1

x = -5

IrinaVladis [17]3 years ago
6 0

Answer:

x=-\frac{4}{83} \\y=\frac{3}{83}

<em>Hope this helps!!!</em>

Sofia

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How many soulutions does the system of equations have x-3y=15. and 3x-9y=45
Irina-Kira [14]

Answer:

<h2>Infinitely many solutions</h2>

Step-by-step explanation:

\left\{\begin{array}{ccc}x-3y=15\\3x-9y=45\end{array}\right\\\\\text{Divide both sides of the second equation by 3}\\\\\dfrac{3x}{3}-\dfrac{9y}{3}=\dfrac{45}{3}\\\\x-3y=15\\\\\text{We received the same equation as the first.}\\\\\bold{CONCLUSION}\\\\\text{The system of equations has infinitely many solutions.}

\left\{\begin{array}{ccc}a_1x+b_1y=c_1\\a_2x+b_2x=c_2\end{array}\right\\\\\text{If}\ a_1=a_2,\ b_2=b_2,\ c_1=c_2,\ \text{then the system of equations}\\\text{ has infinitely many solutions}\\\\\text{If}\ a_1=a_2,\ b_1=b_2,\ c_1\neq c_2,\ \text{then the system of equations}\\\text{has no solutions}\\\\\text{Other the system of equations has one solution.}

5 0
3 years ago
Triangle ABC is isosceles. It is reflected across the y- axis and then translated up 1 unit to form triangle ABC.
Natalka [10]

Answer: True, True, True

Step-by-step explanation:

A. True. Angles B and C are congruent, and since B' is congruent to B, by the transitive property, C is congruent to B', and thus has the same measure.

B. True. AB>BC, and the rigid motions won't change the side lengths.

C. True for the same reason in B.

7 0
1 year ago
The ratio of boys to girls in Anaya’s class is 10 to 15. There are 20 boys how many girls are there
ASHA 777 [7]

Answer:

30 girls

Step-by-step explanation:

10 x 2= 20

15x2=30

For every 10 boys there are 15 girls. since 20 is just 10 multiplied by 2 you can multiply 15 by 2

7 0
2 years ago
Freddie is walking for a charity at a constant rate. After two hours, Freddie has walked 4 miles. At 4 hours, he had walked 8 mi
lesantik [10]

Answer:

Freddie would have walked 25 miles after 12 and a half hours.

Step-by-step explanation:

Given that Freddie is walking at a constant speed, and after 2 hours he walked 4 miles, while after 4 hours he walked 8 miles, to determine how long he walked 25 miles, the following calculation must be performed:

4/2 = Miles per hour

2 miles per hour

2X = Y

2X = 25

X = 25/2

X = 12.5

Therefore, Freddie would have walked 25 miles after 12 and a half hours.

8 0
2 years ago
Simpifly 49/84 <br> ...........
sineoko [7]

Answer:

7/12

Step-by-step explanation:

Divide both the numerator & denoniminator by 7.

49 / 7 = 7

84 / 7 = 12

7/12

3 0
2 years ago
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