7x - 2 = 2y3x = 2y - 1
Solve the system of equations by substitution.
(3/4, 13/8)(1/4, -1/8)no solutioncoincident

Answers

Answer 1

Answer: $\left\{\begin{array}{ccc}7x-2=2y\n3x=2y-1\end{array}\right\n\nsubstitution:\n\n3x=7x-2-1\n3x-7x=-3\n-4x=-3\ \ \ /:(-4)\nx=(3)/(4)\n\n2y=7\cdot(3)/(4)-2=(21)/(4)-2=(21)/(4)-(8)/(4)=(13)/(4)\n2y=(13)/(4)\ \ \ \ /:2\ny=(13)/(8)\n\nAnswer:x=(3)/(4);\ y=(13)/(8).$

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Which is another way to check the sum of 52+23+10+78

Answers

well first off those numbers add up to 163.

A way to check this is to add 52 with 23 which is 75 then add 78 by 10 which is 88 now add 75 with 88 which is 163

Y^2+4x-6x-6y+5=0convert to standard form, find the vertex, focus, and the equation of the directrix line

Answers

I think it is : $x= (Y^2)/(2)-3y+ (5)/(2)$ .

But...not really sure

so first we group like terms
y^2+4x-6x-6y+5=0
y^2-6y-2x+5=0
so I suspect that you might have left out a x^2 but I'll try to solve it how it is

y^2-6y+5-2x=0
factor y^2-6y+5
what adds up to -6 and multiplies to get 5, -1 and -5
(y-5)(y-1)-2x=0
not sure how to procede but you could get it to this
(y-5)(y-1)=2x

I need more help please .....

Answers

Answer:

The area is 2,600 cm^2

Step-by-step explanation:

The area of a rectangle is the product of its sides

And the difference between both areas is 1,400 cm^2 (P-Q)

Thus, we have it that;

40(3x-10) - (30(x + 15)) = 1,400

120x - 400 - 30x - 450 = 1400

120x -30x -400-450 = 1400

90x - 850 = 1400

90x = 1400 + 850

90x = 2,250

x = 2,250/90

x = 25

The area for painting P

is;

40 (3x - 10)

Substituting the value 25 for x

we have

40 ( 3(25) -10)

= 40(75-10)

40 * 65 = 2,600 cm^2

What is a good unit to use to measure the area of a room in a house?A)
square feet
B)
square miles
C)
square inches
D)
square millimeters

Answers

What is a good unit to use to measure the area of a room in a house?A)
square feet
B)
square miles
C)
square inches
D)
square millimeters

♥ Millimeters, way to small
♥ Square inches, no small as well
♥ Miles, to big
♥ And feet is perfect.

Answer:

I just answered because I want the other person to get brainliest. I don't deserve none.

Step-by-step explanation:

:) I'm nice like that.

Sasha finished mowing lawns at 4:15 PM. It took 1 3/4h to mow the first lawn. The second and third lawns she mowed each took 1 1/5 h. She took one 45-min break. When did Sasha begin mowing the first lawn? A. 10.05 A.M. B. 11:05 A.M. C. 11:21 A.M. D. 12:21 P.M.

Answers

The time it took to mow all the lawns including the break he took was 1 3/4+1 1/5+1 1/5+3/4=
2 1/2+2 2/5= 4 9/10 which is 4 hours and 54 minutes and if he got done at 4:15pm then he started 4 hours and 54 minutes before at
C. 11:21 A.M.

What percent of 914 is 457