Solve the equations

Mathematics

1 answer:

valkas [14]4 years ago

8 0

A) 2x + 3y = 2. (1)
x - 2y = 8. (2)

modify (1) to be: 2x = 2-3y
= x = 1-1.5y

put (1) into (2) so: (1-1.5y)-2y = 8
-3.5 y = 7
3.5 y = -7
y = -7/3.5
y=-2

You might be interested in

Help please on this please

mafiozo [28]

A=2
F(2)=2^4-2*2^3+3*2^2-10*2+3
=16-16+12-20+3=-5

7 0

4 years ago

What is the surface area of the triangular prism ?

IgorLugansk [536]

Answer:

Answer choice B, 2376 square feet

Step-by-step explanation:

The explanation takes a long time to write out, but PM me if you need some help!

7 0

3 years ago

Bricklayers use the formula N = 7LH to estimate the number of bricks N needed to build a wall of height H and length L. What is

miv72 [106K]

Plug in 30ft for L and 2310 for n so you will get 2310=7(30)(h)... h would equal 11ft

8 0

3 years ago

2. Refer to matrix B and identify the matrix element b11<br> -3<br> 6<br> 1/2

Valentin [98]

Answer:

See Explanation

Step-by-step explanation:

The question is incomplete as the matrix is not given.

The general form of a matrix is:

$b[m*n] =\left[\begin{array}{ccc}b_{11}&b_{12}&b_{13}........b{1n}}\\b_{21}&b_{22}&b_{23}........b{2n}\\b_{31}&b_{32}&b_{33}........b{3n}\\ \\ \\b_{m1}&b_{m2}&b_{m3}........b{mn}\end{array}\right]$