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3 years ago

How can you check the solution to x+5=3x-1

Mathematics

2 answers:

Dominik [7]3 years ago

7 0

First solve it, then do the reverse operation to it

ikadub [295]3 years ago

7 0

First solve it, then do the reverse opperation

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The coordinates of the vertices of A DEF are D(-4,1), E(3. – 1), and F(-1, – 4)

liq [111]

Answer:

ΔDEF is not a right triangle because no two sides are perpendicular.

Step-by-step explanation:

The coordinates of the vertices of ΔDEF are given to be D(-4,1), E(3,-1) and F(-1,-4).

Now length of DE is given by $\sqrt{(-4-3)^{2}+(1-(-1))^{2} } =\sqrt{53}$ units

length of EF is given by $\sqrt{(3-(-1))^{2}+(-1-(-4))^{2} }=\sqrt{25}$ units

and length of FD is given by $\sqrt{(-4-(-1))^{2}+(1-(-4))^{2} } =\sqrt{34}$ units.

Therefore, 53 ≠ 25+34

Hence, the length of the sides does not support the Pythagoras theorem.

So, ΔDEF is not a right triangle because no two sides are perpendicular. (Answer)

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3 years ago

The quotient of 9.2 x 10 6 and 2.3 x 10 2 expressed in scientific notation is

Virty [35]

What we know:
quotient 9.2 x 10^6/ 2.3 x 10²
in quotients exponents are subtracted of they have the same base, for example 10^6 and 10² have the same base of 10

What we need to find: quotient 9.2 x 10^6/ 2.3 x 10²
9.2 x 10^6
-------------- = 4 x 10^4
2.3 x 10²

Here in this problem I divided 9.2 by 2.3 and got 4, since the solution was simple and clean meaning no repeated decimals I went ahead and divided the 10^6 by 10^2 and got 10^4.

Another method would be to expand both numbers then divide and do scientific notation again.
Remember to change to normal notation you move the decimal to the right using the number of the exponent.

9.2 x 10^6= 9200000
2.3 x 10²= 230

920000/230=40000

40000= 4 x 10^4 scientific notation

Use the method that is best for you or just know you can use either method to check your work.

4 0

3 years ago

A company charges a restocking fee on returned items. Customers must pay a fee of 5% of the cost of the returned item. Part A Wh

Nataliya [291]

Answer:

Step-by-step explanation: The restocking fee (P) is 5 percent of the total cost of the item (C) that was purchased. 5% can be expressed as .05 for the equation.

so, P = .05C

7 0

3 years ago

What are the answers I need help I tried and I am stuck HELP ME PLEASE!!! I Will Give Brainliest!!

Mice21 [21]

Answers: 11-20

Step-by-step explanation: Step 1. Flip the equation Step 2. Add the number to both sides Step 3. Divide both sides by the number to get your answer.

1. v=10 2. m=7 3. r=-9 4. k=9 5. r=0 6. x=10 7. x=6 8. 9=3 9. m=-10 10. n=-10

11.p=0

12.x=10

13.b=4

14.n=0

15.p=2

16.x=8

17.m=8

18.x=3

19.n=-1

20.n=9

4 0