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tiny-mole [99]
3 years ago
8

Use substitution to solve the system. y = 3x-4 4x-5y = −13

Mathematics
1 answer:
andrezito [222]3 years ago
6 0
Y=3x-4
4x-5y=-13
4x-5(3x-4)=-13
4x-15x+20=-13
-11x+20=-13
33=11x
x=3
y=3(3)-4
y=9-4
y=5
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Help me pls<br><br> What is a visual Overlap
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Informally assess the degree of visual overlap of two numerical data distributions with similar variabilities, measuring the difference between the centers by expressing it as a multiple of a measure of variability.


- Hope this helps!
4 0
3 years ago
In science class, the average score on a lab report is 82 points, with all students scoring within 3.2 points of the average. if
gregori [183]

The absolute value equation that represents the minimum and maximum scores is:

|x - 82| = 3.2.

<h3>What is the absolute value function?</h3>

The absolute value function is defined by:

  • f(x) = x, x ≥ 0.
  • f(x) = x, x < 0.

It measures the distance of a point x to the origin.

For this problem, the distance between the minimum and the maximum scores and the mean is of 3.2, that is, the difference between these scores x and the mean of 82 is of 3.2, hence the absolute value equation that represents this situation is given by:

|x - 82| = 3.2.

More can be learned about absolute value equations at brainly.com/question/24514895

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7 0
2 years ago
n the diagram, polygon ABCD is reflected across to make polygon A'B'C'D'. Which statement must be true?
Veronika [31]
True polygon is the abcd polygon
8 0
3 years ago
A recipe requires 3 cups of flour to make 27 dinner rolls. How much flour is needed to make 9 rolls?Mandy runs 4 km in 18 min. S
Rama09 [41]

Answer:

a)1 cup of flour

b)67.5 minutes

Step-by-step explanation:

a) A recipe requires 3 cups of flour to make 27 dinner rolls. How much flour is needed to make 9 rolls?

From the above question, we know that:

27 dinner rolls = 3 cups of flour

9 dinner rolls = x

Cross Multiply

27 rolls × x = 9 rolls × 3 cups

x = 9 rolls × 3 cups/27 rolls

x = 1 cup of flour

Hence, 1 cup of flour is needed to make 9 dinner rolls

b) Mandy runs 4 km in 18 min. She plans to run in a 15 km race. How long will it take her to complete the race?

From the above question:

4 km = 18 minutes

15km = x

Cross Multiply

4km × x = 15km × 18 minutes

x = 15km × 18minutes/4km

x = 67.5 minutes

Hence, in a 15km race , it would take her 67.5 minutes to complete her race.

5 0
3 years ago
Tina uses a $50 gift certificate to buy a pair of pajamas for $17.97, a necklace for $25.49, and 3 pairs of socks that each cost
kotegsom [21]
Do 50 minus 17.97 then take that answer and subtract 25.49 and divide that answer by 3 which equals $2.18. $2.18 is the answer 
7 0
4 years ago
Read 2 more answers
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