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Leokris [45]
4 years ago
12

Another khan academy question

Mathematics
2 answers:
umka21 [38]4 years ago
8 0
Hgxbxhdhdhdjc Nc FDA faces have
uysha [10]4 years ago
4 0

First off, notice that this is a right triangle.

You can use this to help write equation.

Equation : x+ (4x-85)=90. The correct answer is "c"

You might be interested in
The mid point of ab m(1,-1). if the coordinates of a are (7,-4) what are the coordinates of b
uysha [10]

9514 1404 393

Answer:

  b = (-5, 2)

Step-by-step explanation:

b = 2m - a = 2(1, -1) -(7, -4) = (2-7, -2+4)

b = (-5, 2)

__

<em>About the formula</em>

The midpoint is given by the formula ...

  m = (a+b)/2

Solving for b gives ...

  b = 2m -a . . . as above

5 0
3 years ago
The equation 5x - 7(x-1) = ax+b has exactly one solution.
Dimas [21]

Answer:

a = -2  and  b = 7

Step-by-step explanation:

We need to solve for the value of "a" and "b".

We need to distribute and make the left side of the equation same form as the right side of the equation and match the coefficients, simple.

We will use the distributive property shown below to expand the left side and simplify.

<u>Distributive Property:</u>  a(b-c) = ab - ac

Now, simplifying left hand side:

5x - 7(x - 1)

= 5x -7(x) -7(-1)

= 5x -7x +7

= -2x + 7

The right hand side is "ax + b".

If we match left-hand side and right-hand side, we see that:

a = -2

and

b = 7

THese are the only solution.

8 0
3 years ago
Help. As usual i suck at math.
Blababa [14]

Answer:

(4,6) is the solution.

Step-by-step explanation:

Given $ 4x + y = 10 $

Let the solution be $ (a,-6) $.

The solution to this line means it should satisfy the equation. Therefore, substituting this we get,

$ 4(a) - 6 = 10 $

$ \implies 4a = 16 $

Dividing by 4 throughout we get,

$ a = 4 $

Therefore, the solution is: (4,6)

6 0
3 years ago
Consider the composite figure;
Nikolay [14]

Answer:It is the sum of the shape’s volumes.

The volume in terms of pi is the exact volume.

Using the calculator to multiply by pi provides the approximate volume.

Step-by-step explanation:

6 0
3 years ago
How to teach two digit multiplication in a fun way?
Damm [24]
The problem 10x10

10
X10
———
100

The top 0 has lots of friends so 0 goes over to the other 0’s house and they times each other. And 0 times any number is 0 so you put a 0 under the answer line.
Then the top 0 goes over to the bottom 1’s house and they times each other. And 0 times any number is 0 ( because if you have 0 of anything then you don’t have any) so you put a 0 under the answer line next to the 0 YOY put before so now you have 00
Then the top 1 goes over to the bottoms 1’s house and they times each other. And 1 times any thing is the other number ( because if you have 1 of anything then you don’t add anything)
So the you put a 1 by the 00

So your answer is 100!!!


Idk I tried
8 0
4 years ago
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