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4 years ago

Rewrite the following in standard form x-3=2x2-5

Mathematics

1 answer:

kvv77 [185]4 years ago

8 0

Standard form is ax^2+bx+c=0

minus x both sides
-3=2x²-x-5
add 3 toboth sides
0=2x²-x-2
2x²-x-2=0

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Solve the following system of equations by the substitution method.

ruslelena [56]

5x = y + 6 (I)
2x - 3y = 4 (II)
-------------------
We have:
5x = y + 6 → $x = \frac{y+6}{5}$

Soon:
2x - 3y = 4 → $2* (\frac{y+6}{5}) - 3y = 4\to \frac{2y+12}{5} - 3y = 4$
least common multiple (5)
 $\frac{2y+12}{5} - 3y = 4\to \frac{2y+12}{\diagup\!\!\!\!\!5} - \frac{15y}{\diagup\!\!\!\!\!5} = \frac{20}{\diagup\!\!\!\!\!5}$
$2y + 12 - 15y = 20$
$- 15y + 2y = 20 - 12$
$- 13y = 8$
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4 years ago

Solve this before 6:00 and i will give brainliest

tigry1 [53]

Answer:

Step-by-step explanation:

Use PEMDAS. Use a calulator to solve 3 and 1/3 times 1.9+19.5 divided by 4 and 1/2 and after you solve that solve 62/75- 0.16. Divided the first answer by the second. Now move to 3.5+4 and 2/3+ 2 and 2/15 then solve. Next solve 0.5 times ( 1 and 1/20+ 4.1) and with the answer you got from the equation above divided that by the answer just solved. Now divided the number on the left with the number on the right and you should get 4.

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3 years ago

: Use ratio language to describe the relationship of any two things you can think of. Example: For every 5 minutes of jogging, I

kotykmax [81]

For every 5 minutes of jogging, I ran 500 yards

To Find : Use ratio language to describe the relationship of any two things

Determine the unit rate

Solution:

every 5 minutes of jogging, I ran 500 yards

=> 500/5 = 100 yards/ minute

For every 20 minutes , I can type 1000 words in

unit rate = 1000/20 = 50 words per minute

For every 1 hr (60 minutes) I can solve 10 Questions

unit rate = 10/60 = 1/6 Question per minute

For every 10 minutes , i can read 5 pages

unit rate = 5/10 = 1/2 pages per minute

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Selma uses a jogging trail that runs through a park near her home ...

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Keith is saving money for a car. He has saved the same amount ...

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7 0

3 years ago

Use the function below to find F(4) F(x) = 5 * (1/3) ^ x

Inessa05 [86]

The answer for the function F(4) = 5/81

Step-by-step explanation:

The given function is F(x) = 5 * (1/3) ^ x

step 1 :

The x value is given as the input to get the output from F(x)

step 2 :

Here, F(4) means that the x value is x=4

step 3 :

Now, substitute x=4 in the given function F(x)

F(4) = 5 (1/3)^4

=5 (1/81)

F(4) = 5/81

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4 years ago

I have a car dealership employing 4 mechanics. I received 20 cars to repair today. How

schepotkina [342]

We are given that car dealership employed 4 mechanics. and 20 cars came there.

That means each employee should handle $\frac{20}{4} = 5 cars$

Which means we need to choose 5 cars from 20 cars first . For that we need to use combinations since order in which car is given to mechanic does not matter.

Hence number of ways = $20_{C_{5} }$ = $\frac{20! }{15! * 5!}$ = 15504 ways of allocating.

5 0

3 years ago