Please help I will mark!!

Mathematics

1 answer:

marin [14]3 years ago

6 0

Answer:788

Step-by-step explanation:

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To the nearest tenth, find the perimeter of ∆ABC with vertices A(-1,4), B(-2,1) and C(2,1).

swat32

First we need to find the length of each side of the triangle , and for that we need to use the distance formula, that is
$d =\sqrt{(x_{2} -x_{1})^2 +(y_{2} -y_{1})^2}$
$AB = \sqrt{(1-4)^2 +(-2+1)^2}= \sqrt{10}$
$\sqrt{BC} = \sqrt{(1-1)^2 + (2+2)^2}=4$
Perimeter is the sum of all sides.
$Perimeter = AB + BC + AC = \sqrt{10}+4 +\sqrt{18}$
$Perimeter= 11.4$

7 0

2 years ago

If your good at math please help me with this question

solmaris [256]

Answer:

answer: 361.88

Hope that helps!

5 0

2 years ago

A building has a window that is 12 feet high. Stan is going to use a ladder to get up to the window and decides to keep the ladd

olasank [31]

Answer=13 feet long

This information describes a right triangle, with sides 5ft and 12ft.

a²+b²=c²
5²+12²=c²
25+144=c²
169=c²
√169=√c²
13=c

The ladder needs to be 13ft long

3 0

3 years ago

The temperature of the furnace is 1200 and cool at a rate of 15 per minute the temperature of another furnace is 900 and is heat

Hunter-Best [27]

Answer:

After 15 minutes, the temperature of both the furnaces will be same.

Step-by-step explanation:

Let $x$ be the minutes when the temperature of both becomes same.