Which of the following would not be the result of a substitution in the following system?2x + y = 7
y - x= 1
A. 7 - 2x- x = 1
B. 2x + x + 1 = 7
C. 2(y + 1) + y = 7
Answers
Hello!
The correct option is:
C.
Why?
To find which of the given options are not the result of a substitution in the given system, we need to isolate the variable in function of the other variable, and then substitute it.
So, substituting and discarding, we have:
- First equation:
Isolating "y", we have:
Then, substituting it into the second equation, we have:
We have that it's a result of a substitutiong in the following system (option A)
- Second equation:
Isolating "y", we have:
Then, substituting it into the first equation, we have:
.
So, the correct option is:
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Have a nice day!
Answer:
C. 2(y + 1) + y = 7
Step-by-step explanation:
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The model will be 6 toothpicks tall.
Answer:
The model will be approximately 5 cotton swabs tall.
The model will be 6 toothpicks tall.
Step-by-step explanation:
Find the number of centimeters in the scale model represented by 1 foot on the actual school.
1 ft
1.26 cm
1 foot on the actual school equals 1.26 centimeters on the scale model.
Find the height for your scale model represented by the height of the school.
1 ft × 30
1.26 cm × 30
=
30 ft
37.8 cm
The school will be 37.8 cm tall in your model.
To find how many toothpicks tall your model will be, divide its total height by the height of one toothpick.
37.8 cm ÷ 6.3 cm = 6
The model will be 6 toothpicks tall.
To find how many cotton swabs tall your model will be, divide the height of the model by the height of one cotton swab. If necessary, round to the nearest whole number.
37.8 cm ÷ 7.7 cm ≈ 5
The model will be approximately 5 cotton swabs tall.
Answers
=$5
There for
$25+$5
=$30
Answers
Answer:
x = 10
y = 70
Step-by-step explanation:
By using the vertical angles theorem we know that x+ y +10 = 90, also simplified to x + y = 80
and 2x + y = 90
By using the substitution method on x + y = 80, it will be y = -x + 80
When you put into the equation 2x + y = 90 you will get 2x -x +80 = 90
Then it will simplify to x = 10
After that plug 10 into x + y = 80 to 10 + y = 80 and get y = 70
Answers
The number of redbeads she has is 350.
What is a fraction?
A fraction is written in the form of a numerator and a denominator where the denominator is greater that the numerator.
Example: 1/2, 1/3 is a fraction.
We have,
Number of green beads = 60
The number of red beads.
= 5(5/6) x 60
= 35/6 x 60
= 35 x 10
= 350
Thus,
The number of redbeads is 350.
Learn more about fractions here:
#SPJ3
Answers
The divisor is 30.
The dividend is 288.
The quotient is 9.
The remainder is 3.
The remainder is 3.