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Simora [160]
3 years ago
13

Which explanation best describes how to solve this problem?

Mathematics
1 answer:
Minchanka [31]3 years ago
4 0
I believe it is a but i will double check and post ok

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The height of a triangle is 7 ft more than its base. if the area of the triangle is 30 ft^ what is the lentgh of the base
Dmitriy789 [7]
Since the area of a triangle is in the form
area=0.5(base)(height)
height=base+7
let base=x
area=0.5(x)(7+x)
30=3.5x+0.5x^2
multiply the equation by 2
60=7x+x^2
subtract 60 from both sides
x^2+7x-60=0
(x-5)(x+12)=0
thus  x=5 or x=-12 since we are only considering positive answers
x=-12 is rejected
so base=5 and height=5+7=12
6 0
3 years ago
Plz I need some help this is a quick one and I'm having trouble focusing!
Ivenika [448]

Answer:

Juan:34

Kim:30

Larry:36

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
3) Veronica traveled 126 miles on 3 gallons of gas. On another trip she traveled 210 miles on 5 gallons of gas. Find the unit ra
Goshia [24]
The answer is 42 mpg, all you need to do is divide 126/3 or 210/5 and they both equal 42.
8 0
3 years ago
Mark says that the number square root two is irrational number because he can write it as a fraction square root two over one is
Elan Coil [88]

Answer:

Step-by-step explanation:

A rational number are numbers that can be expressed as as fraction. They can be expressed as a ratio of two integers. An irrational is quite the opposite.  An irrational number cannot be expressed as a ratio of two integers.

Taking square root of two as an example;

√2 cannot be expressed as a ratio of two integers because the result will always be a decimal. If expressed as √2/1, it is still not a rational number because of the square root of 2 at the numerator. Square root of 2 is not an integer even though 1 is an integer.

Mark is wrong because √2 is irrational and it is irrational because it cannot be expressed as a ratio of two integers <em>not due to the fact that he can write it as a fraction.</em>

6 0
3 years ago
Someone please help what’s 9+10?
Digiron [165]

Answer:

Hey There!

\huge\colorbox{yellow}{Myself \: someone}

9 + 10 = 19

3 0
3 years ago
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