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jasenka [17]
3 years ago
13

Solve 7x+y=50 4x+y=23 simultaneously

Mathematics
2 answers:
Aloiza [94]3 years ago
6 0

<em>so</em><em> </em><em>the</em><em> </em><em>valu</em><em>e</em><em> </em><em>of</em><em> </em><em>x</em><em> </em><em>is</em><em> </em><em>9</em><em> </em><em>and</em><em> </em><em>y</em><em> </em><em>is</em><em> </em><em>-</em><em>1</em><em>3</em><em>.</em>

<em>Hope</em><em> </em><em>this</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em>

Cloud [144]3 years ago
4 0

Answer:

x = 9 and  y = -13

Step-by-step explanation:

7x + y =50.... eq 1

4x + y =23....eq 2

Subtract eq 2 from eq 1

7x + y = 50

-

4x + y = 23

This becomes;

7x - 4x + y - y= 50 -23

3x = 27

Divide both sides by the coefficient of x; 3

x = 9

Slot in the value of x in eq 1

7 (9) + y = 50

63 + y = 50

Subtract 63 from both sides

63 - 63 + y = 50 - 63

y = -13

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Pls only help if you know the correct answer!!! thanks!!
Zinaida [17]

Answer:

Y=10x

Step-by-step explanation:

I hope this helped you

4 0
3 years ago
A survey of 2500 subscribers to a certain news paper revealed that 2250 people subscribe to the daily morning edition and 1250 s
Aleks04 [339]

1500 people subscribed Sunday edition and 250 people subscribed only sunday edition.

<u>Solution:</u>

Given, A survey of 2500 subscribers to a certain news paper revealed that 2250 people subscribe to the daily morning edition  

And 1250 subscribe to both the daily and the sunday editions.  

We have to find how many subscribe to the Sunday edition? how many subscribe to the Sunday edition only?

Let x denote the number who subscribe to the Sunday edition.  

Then the addition rule with overlap tells us that  

Those who subscribe daily edition + those who subscribe sunday edition - those who subscribe both daily and sunday edition = total subscribers in survey

2250 + x – 1250 = 2500

1000 + x = 2500  

x = 1500  

so, 1500 subscribe to the Sunday edition and 1500 – 1250 = 250 subscribe to the Sunday edition only.

Hence, 1500 people subscribed Sunday edition and 250 people subscribed only sunday edition.

6 0
3 years ago
You spend 60 on clothes and buy 3 dvd movies. your friend spends nothing on clothes and buys 8 dvd movies. you both spend the sa
garik1379 [7]
Each dvd cost $7.50 how? Your friends buy 8 dvd's and in total is 60, you want to divide 60 from 8 and find that it's 7.50 and then multiply 8 to 7.50 and it should be 60. Hope this helps!!

5 0
3 years ago
A construction worker needs to determine the volume of a sandpille in a construction yard as shown
postnew [5]
Answer:
6580cm
Step-by-step explanation:
The answer is 6580cm because....
Step one First let's figure out what the smaller shape's volume is. To do so we need to multiply ( LxWxH ) so 6x5x? it does not list what the height is so we know it has the same height as the larger shape and it's height is 14cm so we will use 14cm. 6x5x14=420cm
Step two Now lets find the Volume of the larger shape. So lets do LxWxH so Lx?x14 it does not give us the length so we need to add up all of the numbers along the line. We got 7cm then 5 from the bottom of the smaller shape and 10cm. all ads up to 22cm so 20x22x14=6160
Finally we add up the following shapes Volume which are 6160+420=6580cm
3 0
3 years ago
Really need help <br> Five less than twice what negative number squared is 157?
Cerrena [4.2K]

Answer:

-9

Step-by-step explanation:

2(-x)² - 5 = 157

2x² - 5 = 157

add 5 to each side of the equation:

2x² = 162

divide both sides by 2:

x² = 81

√81 = 9 or -9

5 0
3 years ago
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