3 years ago

Just keep getting more homework. i really need help

Mathematics

1 answer:

rusak2 [61]3 years ago

4 0

Answer:

1. x = 1, y = -3

2. x = 3, y = 4

Step-by-step explanation:

Here, we want to solve the sets of simultaneous equations;

a) -y = 5x-2

-3y = -5x + 14

substitute 1 into ii

3(5x-2) = -5x + 14

15x - 6 = -5x + 14

15x + 5x = 14 + 6

20x = 20

x = 20/20

x = 1

from;

-y = 5x - 2

y = -5x + 2

y = -5(1) + 2

y = -3

b) -2y = -6x + 10

2y = x + 5

Substitute ii into i

-(x + 5) = -6x + 10

-x - 5 = -6x + 10

-x + 6x = 10 + 5

5x = 15

x = 15/5

x = 3

2y = x + 5

2y = 3 + 5

2y = 8

y = 8/2

y = 4

You might be interested in

A book sold 34,200 copies in its first month of release. Suppose this represents 8.8% of the number of copies sold to date. How

omeli [17]

388,636.36 copies have been sold

3 0

3 years ago

Factor completely 3X^2 -25

Dominik [7]

In order to factor a polynomial, you have to find its roots

$x_1,\ x_2,\ldots,x_n$

So that you can factor it as

$p(x)=(x-x_1)(x-x_2)\cdots(x-x_n)$

So, in this case, we're looking for the solutions of

$3x^2-25=0 \iff 3x^2=25 \iff x^2 = \dfrac{25}{3} \iff x=\pm\sqrt{\dfrac{25}{3}}=\pm\dfrac{5}{\sqrt{3}}$

So, the polynomial can be written as

$3x^2-25 = \left(x-\dfrac{5}{\sqrt{3}}\right)\left(x+\dfrac{5}{\sqrt{3}}\right)$

5 0

3 years ago

Please help me idk this

marusya05 [52]

Answer:

56.52

Step-by-step explanation:

you do 3.14 times 18

8 0

4 years ago

What value will make the equation true? <br> Y + 2 + 6 + Y = 86

g100num [7]

Answer:

Step-by-step explanation:

you need to work backwards

86-2-6=78

therefore, 78 = 2y

y = 2y/2, so 78/2 = 39

5 0

3 years ago

Read 2 more answers

At a picnic, hamburgers and hotdogs were consumed in the ratio 7 to 4. If 41 hamburgers were consumed, how many hot dogs were co

GrogVix [38]

The answer should be 19

8 0

3 years ago