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3 years ago

Help plzzzzz it's a 9th grade question

Mathematics

1 answer:

Semenov [28]3 years ago

4 0

X is equal to 7 and y is equal to 63
you get this by equaling the two y= equations to each other so 9x=2x+49 then you would solve algebraically to get x so 7x=49.
X=7
Then you would go back to the two original y= equations and place the value of x into the equation to find the value of y so
Y=9(7)
Y=63 and if you want to check it to make sure its right you can place it into the other y= equation and the values should be the same and in this case they are so the values are correct .

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Which of the following is the total number of cubic units needed to fill a space figure

attashe74 [19]

Answer:

Volume is the required answer.

Step-by-step explanation:

The number of cubic units needed to fill the space inside a three-dimensional figure.

For example:- air in room, fluids in container, water in a bottle, etc.

I got this answer with complete explanation from Gauthmath app. They have the tutors who can answer our questions. In my opinion it's a very good app to get help. You don't even need to wait. I think you should check it out once.

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8 0

3 years ago

Need help use screenshot(SAT Prep) In △ABC, AB = BC = 20 and DE ≈ 9.28. Approximate BD. bd equals?

Lilit [14]

Answer:

5.36

Step-by-step explanation:

Given that:

<BAD = <CAE, therefore, BD = EC

Let's take x to be the length of BD = EC

BD + DE + EC = BC

BC = 20,

BD = EC = x

DE ≈ 9.28

Thus,

x + 9.28 + x = 20

x + x + 9.28 = 20

2x + 9.28 = 20

Subtract 9.28 from both sides

2x + 9.28 - 9.28 = 20 - 9.28

2x = 10.72

Divided both sides by 2 to solve for x

$\frac{2x}{2} = \frac{10.72}{2}$

$x = \frac{10.72}{2}$

$x = 5.36$

BD ≈ 5.36

4 0

4 years ago

Jada bikes 2 miles in 12 minutes.

drek231 [11]

A 1/6 miles per minute

6 0

3 years ago

Read 2 more answers

Prove that if a and b are nonzero integers, a divides b, and a b is odd, then a is odd.

hammer [34]

It is proved that the if a and b are nonzero integers, a divides b, and a b is odd, then a is odd.

According to the statement

we have to prove that the if a and b are nonzero integers, a divides b, and a b is odd, then a is odd.

And for this proof we use the contradiction

So,

Proof by contradiction is a common proof technique that is based on a very simple principle: something that leads to a contradiction can not be true, and if so, the opposite must be true.

So for this purpose,

Assume a is even, so a = 2k for some integer k. Now let a and b be integers such that a divides b and a + b is odd.

Since a divides b, b = an for integer n, and in turn b = 2nk, which means b is even and hence a + b is also even. But this contradicts our initial assumption, so a must be odd.

So, It is proved that the if a and b are nonzero integers, a divides b, and a b is odd, then a is odd.

Learn more about integers here

brainly.com/question/17695139

#SPJ4

7 0

2 years ago

Write down the explicit solution for each of the following: a) x’=t–sin(t); x(0)=1

Kay [80]

Answer:

a) x=(t^2)/2+cos(t), b) x=2+3e^(-2t), c) x=(1/2)sin(2t)

Step-by-step explanation:

Let's solve by separating variables: