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Paul [167]
3 years ago
14

7x+3y=22 4y=20 I need to know how to write this equation out with the answer

Mathematics
2 answers:
xeze [42]3 years ago
5 0
7x+3y=22
4y=20

4y=20
y=5

Substitute to first equation
7x+15=22
7x=7
x=1
WITCHER [35]3 years ago
3 0
\begin{cases} 7x+3y=22 \\ 4y=20 \ \ /:4 \end{cases}\\ \\\begin{cases} 7x+3 \cdot 5=22 \\ y= 5 \end{cases}\\ \\\begin{cases} 7x+15=22 \ \ |-15 \\ 4y=20 \end{cases}

\begin{cases} 7x+15 -15=22 -15 \\ y=5 \end{cases}\\ \\\begin{cases} 7x =7\ \ / :7 \\ y=5 \end{cases}\\ \\\begin{cases} x =1 \\ y=5 \end{cases}\\ \\


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oee [108]

Answer:

90°

Step-by-step explanation:

5 0
3 years ago
which graph represents the solution set of the system of inequalities? (is my selected answer correct, if not please help!!)
algol [13]

Answer:

the graph on the right-top

Step-by-step explanation:

Transferring an "x" to the right side in x+y\ge-3, we get y\ge -x-3

The system of inequalities is

\left \{ {{y

We have y=2x+2 - ascending function with a=2, b=2

b=2 shows that ascending function intersects Y-axis is in y=2 - that situation is only on the right-top and left-down. So, we refuse left-top and right-down.

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On the left-down we have an area above both functions, so we refuse this picture

Right-top is correct


7 0
3 years ago
Solve: 28 − ≥ 7( − 4)<br> (show your work)<br> real answers only pls :(
ohaa [14]
You’ll distribute the 7 from (x-4) so your equation will be
28-x>_ 7x-28
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-56>_ -8x
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x is less then or equal to 7
6 0
2 years ago
Two gears in a machine are aligned by a mark drawn from the center of one gear to the center of the other. If the first gear has
scoray [572]

Answer:

The firstgear needs to make five revolutions in order for the marks to line up again.

Step-by-step explanation:

4 0
3 years ago
4.1 cm the scale on the map is 1 cm=4.5 km. What is the actual distance
evablogger [386]

If you are taking the cm to km then it would be like this

4.5km*4.1cm= 18.45km

5 0
3 years ago
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