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lutik1710 [3]
3 years ago
13

What is the solution to this system of equations? 3x-2y=5 x+2y=7 x=_, y=_

Mathematics
2 answers:
scZoUnD [109]3 years ago
6 0

Answer:

Step-by-step explanation:

Dmitry_Shevchenko [17]3 years ago
3 0

Step 1) Solve the second equation for

x

:

x

+

3

y

=

−

5

x

+

3

y

−

3

y

=

−

5

−

3

y

x

+

0

=

−

5

−

3

y

x

=

−

5

−

3

y

Step 2) Substitute

−

5

−

3

y

for

x

in the first equation and solve for

y

:

3

(

−

5

−

3

y

)

−

2

y

=

7

−

15

−

9

y

−

2

y

=

7

−

15

−

11

y

=

7

15

−

15

−

11

y

=

15

+

7

0

−

11

y

=

22

−

11

y

=

22

−

11

y

−

11

=

22

−

11

−

11

y

−

11

=

−

2

y

=

−

2

Step 3) Substitute

−

2

for

y

in the solution to the second equation at the end of Step 1 and calculate x:

x=−5−(3×−2)

x=−5−(−6)

x=−5+6

x=1

The solution is x=1 and y=−2

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Write an equation for the translation of x^2 + y^2 = 49 by 7 units right and 4 units up
Tatiana [17]

Answer:

(x - 7)² + (y - 4)² = 49

Step-by-step explanation:

Given

Equation: x² + y² = 49

Required:

New Equation when translated 7 units right and 4 units up

Taking it one step at a time.

When the equation is translated 7 units right, this implies a negative unit along the x axis.

The equation becomes

(x - 7)² + y² = 49

When the equation is translated 4 units up, this implies a negative unit along the y axis.

(x - 7)² + (y - 4)² = 49

The expression can be further simplified but it's best left in the form of

(x - 7)² + (y - 4)² = 49

8 0
3 years ago
In a scale drawing, the tength of a
yanalaym [24]

Answer:

a) 1/36in.

b) 1/54in

Step-by-step explanation:

a) convert feet to inches:

L = 18ft = 216in

if length in image is 6in then 216in/6in. 36in is Scale.

width of original room = 108in.

check: 216*1/36 = 6

b) L = 18ft = 216in

216in/4in = 54in.

check: 216*1/54 = 4

8 0
2 years ago
<img src="https://tex.z-dn.net/?f=5%20%5Csqrt%7B20%7D%20" id="TexFormula1" title="5 \sqrt{20} " alt="5 \sqrt{20} " align="absmid
SOVA2 [1]

Answer:

Step-by-step explanation:

=5\sqrt{20}

=5\sqrt{2^{2}*5 }

=5\sqrt{2x^{2} }  \sqrt{5}

=5 * 2\sqrt{5}

=10\sqrt{5}

3 0
3 years ago
Proportion problem<br><br><br><img src="https://tex.z-dn.net/?f=%5Cfrac%7B8%7D%7B9%7D" id="TexFormula1" title="\frac{8}{9}" alt=
kipiarov [429]

Answer: w=66/9

Step-by-step explanation: 8/9=w-2/6

8(6)=9(w-2)

48 =9w-18

48+18=9w

66=9w

w=66/9

or w=7(3/9)

6 0
3 years ago
Read 2 more answers
Need Help with 44.. picture above
Daniel [21]

Answer:

Ok:

Step-by-step explanation:

I see that you set up 90 miles = 60 mph * t, where you found out that t = 1.5. What what you needed to do was set 180 miles = 45 mph * t. This is because it is 45 mph for the <em>whole</em> trip. Then, you find that t = 4 hours. That that means that he spent 2.5 hours driving back. Then, we can do d=vt and find 90/2.5 as the speed he went home at. Which comes out to be 36 mph.

8 0
3 years ago
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