since there is already 2 7x's we can multiply a positive 1 so we can eliminate the 7x's
+1 (-7x-4y=-7) = 7x+4y=7
7x+4y=7
-7x-2y=-4
2y=3
divide 2 on both sides to isolate y
y=2/3
now to find x you will have to plug in 2/3 to one of the original equations
-7x-2(2/3)=-4
-7x-1.33=-4
add 1.33 to both sides
-7x=2.67
divide -7 on both sides
x=0.38
hope this helped hon:)
Answer:
9' - 1.29"
Step-by-step explanation:
Total rise = 5' - 2"
Total run = 7' - 6"
1' = 12" = 1 feet = 12 inches
5' = 5 * 12 = 60"
3' = 7 * 12 = 84"
Total rise = 60" + 72" = 62"
Total run = 84" + 6" = 90"
Length of stringer = hypotenus
Hypotenus = √(total rise² + total run²)
Hypotenus = √(62² + 90²)
Hypotenus = 109.28860"
Convwrting back to feet and inches
= 9' - 1.29"
9 is to 36 as 10 is to 40 -is how you should write the proportion 9:36 = 10:40 using words.
The true statement about this information is that: A. It is both a relation and a function.
<h3>What is a function?</h3>
A function can be defined as a mathematical expression which can be used to define and represent the relationship that exist between two or more variables in a population.
In this context, we can infer and logically deduce that the true statement about this information collected by Jen is that it's both a relation and a function because it indicates a relationship between two variables.
Read more on function here: brainly.com/question/4246058
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Answer:
Number of girls = 15
Step-by-step explanation:
girls : boys = 5 : 4
Number of girls = 5x
Number of boys = 4x
Total students = 27
5x +4x = 27
9x = 27
x = 27/9
x = 3
Number of girls = 5x = 5*3 = 15
