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2 years ago

So what is it ? I cannot figure it out and need help

Mathematics

2 answers:

Lena [83]2 years ago

7 0

What is your question??

choli [55]2 years ago

4 0

What do you need help with?

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Which ordered pair (a,b) is a solution to the given system of linear equations.

egoroff_w [7]

Answer:

A. (-13,-3)

Step-by-step explanation:

Solve the system of two equations:

$\left\{\begin{array}{l}-2a+3b=14\\a-4b=3\end{array}\right.$

From the second equation:

$a=3+4b$

Substitute it into the first equation:

$-2(3+4b)+3b=14\\ \\-6-8b+3b=14\\ \\-8b+3b=14+6\\ \\-5b=20\\ \\5b=-20\\ \\b=-4$

So,

$a=3+4b=3+4\cdot (-4)=3-16=-13$

The solution is (-13,-4)

6 0

3 years ago

Read 2 more answers

Can anyone help me? The top is geometry and the bottom is algebra...

umka21 [38]

Answer:

<u>Geometry</u>

AC equals 13x + 7

<u>Algebra</u>

1. x = -16

2. x = 2

3. 2x^2 - 5x -7

4. (2x + 1)(x - 5)

Step-by-step explanation:

6 0

3 years ago

Beth can run 3 miles in 25.8 minutes. How long does it take her to run1 one mile you

Dmitry_Shevchenko [17]

Answer: 8.6

Step-by-step explanation:

25.8 divided by 3

3 0

3 years ago

Read 2 more answers

Someone please help what’s 9+10?

Digiron [165]

Answer:

Hey There!

$\huge\colorbox{yellow}{Myself \: someone}$

$9 + 10 = 19$

3 0

2 years ago

Rashau made a rectangular frame for her latest oil painting. The length is 28 centimeters more than triple the width. The perime

postnew [5]

The length is about 28 more than three times the width. Denoted as (a) width, and as (b) the length. Then move on to lay the system of equations, as done below:

$\begin{cases}2a+2b=136\\b=3a+28\end{cases}$
$\begin{cases}2a+2b=136|:2\\b=3a+28\end{cases}$
$\begin{cases}a+b=68\\b=3a+28\end{cases}$
$\begin{cases}a+3a+28=68\\b=3a+28\end{cases}$
$\begin{cases}4a=40|:4\\b=3a+28\end{cases}$
$\begin{cases}a=10\\b=3*10+28\end{cases}$
$\begin{cases}a=10\\b=58\end{cases}$

The short side has a length of 10 cm, and 58 cm long.

5 0

3 years ago