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Gennadij [26K]
3 years ago
11

:3 Help in math, please? I will give you a cookie.

Mathematics
1 answer:
den301095 [7]3 years ago
4 0
Y=5-3x
5x-4y=-3

y=5-3x
-4y=-3-5x
----------------
-3y=2-7x


-3(y)=2-7(x)
u can try plugging in any number for y

-3(3)=2-7x
9=2-7x
-2 -2
7=7x
-- --
7 7
1=x

so 3,1
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What is the value of the expression 5y2 + 4x when x = 2.5 and y = 3?
galina1969 [7]

Answer:

The answer is 40

Step-by-step explanation:

5*3=15

15*2=30

4*2.5=10

So 30+10=40

Hope this helps!!

7 0
3 years ago
Rewrite 1/4 1/3as a unit rate​
noname [10]

1/4 = 0.25 = quarter

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3 0
3 years ago
The product of two consecutive positive odd integers is 255. find the smaller integer.
vesna_86 [32]
X(x+2)=255
x²+2x-255=0
(x-15)(x+17)=0
x=15 or x=-17
take the positive number only, so the two consecutive positive odd integers are 15 and 17.
7 0
3 years ago
For each ordered pair determine whether it is a solution to the system of equations 2x-7y=8 -3x+2y=5
rodikova [14]

Answer:

The solution of this system of linear equations is (x,y) = (-3,-2).

Step-by-step explanation:

Let be the following system of linear equations:

2\cdot x - 7\cdot y = 8 (1)

-3\cdot x + 2\cdot y = 5 (2)

From (1) we clear y:

2\cdot x -8 = 7\cdot y

y = \frac{2\cdot x - 8}{7}

And we apply this variable in (2):

-3\cdot x+2\cdot \left(\frac{2\cdot x -8}{7} \right)= 5

-3\cdot x +\frac{4}{7} \cdot x -\frac{16}{7} = 5

-\frac{17}{7}\cdot x = \frac{51}{7}

x = -\frac{51}{17}

x = -3

And the value of y is:

y = \frac{2\cdot (-3)-8}{7}

y = -\frac{14}{7}

y = -2

The solution of this system of linear equations is (x,y) = (-3,-2).

4 0
3 years ago
Xy^3 <br> What is the coefficient?
marin [14]
Xy is the coefficient
4 0
3 years ago
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