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viva [34]
2 years ago
14

Create an equivalent system of equations using the sum of the system and the first equation.

Mathematics
1 answer:
IrinaVladis [17]2 years ago
3 0

Answer:

B-

-5x + 4y = 8

-x + 5y = 10

Step-by-step explanation:

x+ 4y = 8, we'll call this A

4x + y = 2, we'll call this B

To create the equivalent system, you can mulitply or divide by a coeffecient, to get a pure solution. If you add or subtract, the system is unchanged.

We are adding A to B

x + 4y = 8 + 4x + y = 2

5x + 5y = 10, we'll call this C.

The new equation is the basis for the equivalent system, where C replaces B

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The area of a square is 49 square meters. What is the length (in meters) of one side of the square?
AlladinOne [14]

Answer:

7

Step-by-step explanation:

8 0
3 years ago
Jim have the shopkeeper six coins that totaled 38 cent for a balloon what were the six coins
Katyanochek1 [597]

We are given that

Shopkeeper has six coins

total number of coins =6

we know that

there are four types of coins

(1) cents

1 cent =1 cent

(2) nickels

1 nickel =5 cents

(3) dimes

1 dimes =10 cents

(4) quarters

1 quarter = 25 cents

so, we can use trial and error method

Since, nickels , dimes and quarter are multiple of 5

and there 38 cents

so, three coins must be cent

number of cent coins =3

so, the remaining cent = 38-3=35

so, possible coins can be 1 quarter and 2 nickels

1 quarter + 2 nickels =25+2(5)=35

so, coins were

Number of cents =3

Number of nickels =2

Number of dimes =0

Number of quarter =1..................Answer

6 0
3 years ago
Write a sine or cosine function for the data set
dmitriy555 [2]

Answer:

though this is difficult i know you would get it. Anyhow im real tired... will solve later... gl

5 0
4 years ago
28 POINTS BRAINLIEST
Arisa [49]

Answer:

The roots can be seen from the graphs as - 4 and +4

The equation is :

x² - (sum of roots) + (product of roots)

Equation is x² -16

I hope you got it

7 0
4 years ago
The value of y is directly proportional to the value of x. If y=65 when x=5, what is the value of y when x=12?
liraira [26]
Y=65
X=5
X=12
Y=?

65—->5
?——>12

Cross multiply

Y= (65x12) / 5
Y= 780 / 5
Y= 156

To check add the Y value in and remove an X value

65——> ?
156 ——> 12

Cross multiply

X= (12x65) / 156
X= 780 / 156
X= 5

You got the right answer. Hope this helped.
4 0
4 years ago
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