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3 years ago

If you now you a PRO at math ples help 100 points AND BRAINLESS

Mathematics

1 answer:

frutty [35]3 years ago

8 0

Answer:

C) 50 square units

Step-by-step explanation:

from (-4,-1) to (6,-1) is 10

from (-4,-1) to (-4,4) is 5

10x5=50

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Does a quadrilaterals have 4 corners

horrorfan [7]

A quadrilateral does have 4 side

3 0

3 years ago

What is the area of this triangle?<br><br> A=bh2

Galina-37 [17]

Alright, so you know that the formula for the area of a triangle is a=bh/2

First start out by identifying your base and height.

Base is the side that the shape is "standing on", in this case, that would be 9cm.

Now, the height is the measurement that is perpendicular (90 degrees to the base), which in this case is 12 cm.

Now, plug these values into your formula

(12)(9) /2 = 54 cm squared! hope this helps :)

8 0

3 years ago

The sum of the three numbers is 180. The first number is 10 more than the mean of the three numbers and the second number is 4 l

4vir4ik [10]

Answer:

The third number (c) is 54.

The other ones are 70 and 56.

Step-by-step explanation:

We have 3 numbers, let's call them a, b and c.

We know that the sum of the three numbers is 180, thus:

$a+b+c=180$

We also know that the first number is 10 more than the mean of the three numbers <em>(Note: the mean is the sum of the numbers divided by the number of numbers).</em> Thus:

$a=\frac{a+b+c}{3} +10\\a=\frac{a+b+c+30}{3} \\3a=a+b+c+30\\2a=b+c+30$

Finally the second number is 4 less than the mean:

$b=\frac{a+b+c}{3}-4\\b=\frac{a+b+c-12}{3} \\3b=a+b+c-12\\2b=a+c-12$

Now we have our set of equations and we can proceed to solve them:

$a+b+c=180\\2a=b+c+30\\2b=a+c-12$

Solving for a in our first equation we have: $a=180-b-c$ and substituting this in our second equation we have:

$2a=b+c+30\\2(180-b-c)=b+c+30\\360-2b-2c=b+c+30\\330=3b+3c\\110=b+c$

Now taking this last result into our first equation we have:

$a+b+c=180\\a+(b+c)=180\\a+110=180\\a=70$

Now we are going to solve for b in our second equation and substitute this in our third equation: $b= 180-a-c$

$2b=a+c-12\\2(180-a-c)=a+c-12\\360-2a-2c=a+c-12\\372=3a+3c\\124=a+c$

But we know that a =70, so we can substitute it in our last line:

$124=a+c\\124=70+c\\54=c$

Now we just need to find b and we can use our first original equation to do this:

$a+b+c=180\\70+b+54=180\\124+b=180\\b=180-124\\b=56$

8 0

4 years ago

I need help with the solution to the problem

LUCKY_DIMON [66]

Answer:

(-1,2)

Step-by-step explanation:

The solution to the system graphed is where both of the lines intersect. That's because the intersecting point means that when you substitute x into both of the equations, you'll get the same y value.

If you look on the graph, the intersecting point is (-1,2)

6 0

3 years ago

Read 2 more answers

Solve for x in the diagram below

ella [17]

Answer:

Step-by-step explanation:

3x + x + 100 = 180 (sum of angles on a straight line)

4x = 180-100

4x=80

divide both sides by 4

x=20

8 0

4 years ago

If you now you a PRO at math ples help 100 points AND BRAINLESS ​

If you now you a PRO at math ples help 100 points AND BRAINLESS