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arlik [135]
2 years ago
13

What is the following equation written in standard form? –3x² + 7x=9 NEED HELP ASAP

Mathematics
1 answer:
yKpoI14uk [10]2 years ago
3 0

Answer:

-3x^2 + 7x - 9 = 0

The third answer

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50 POINTS!!!!!!!
nevsk [136]

Answer: Option C)1 over 15 minus 1 over x equals 1 over 20

Explanation:

Since, Micah can fill a box with books in 15 minutes.

Therefore, the work done by Micah in one minute= 1/15

Also, Sydney takes the books out puts them on a shelf.

And the times taken by Micah when Sydney is also taking the books outside from the self= 20 minutes

Therefore, the work done by Micah in one minute when Sydney  taking books out of the box= 1/20

Let Sydney alone takes x minutes to take books outsides the shelf.

Then, work done by Sydney in one minute=1/x

Thus, the work done by Sydney( by taking books out of the box)=  the work done by Micah - work done by Micah and Sydney simultaneously= 1/15-1/20

⇒1/x=1/15-1/20

⇒1/15-1/20=1/x

⇒1/15-1/x=1/20 is the required expression.

Therefore, Option C is correct.



4 0
3 years ago
Read 2 more answers
I don't know how to do these sort of problems... Can someone help me out?
VLD [36.1K]
180=76+4x
180-76=4x
104=4x
104/4=x
26=x
Measurement A= 26
6 0
3 years ago
Bruce has a bottle that contains 60% of lemon juice and the rest water. The bottle has 1 liter of water. PART A: Write an equati
Lelechka [254]
Part A:
there is 60% of lemon juice in a 1 liter of water
so 60% *OF* the 1 liter
( of technically means * in mathematics)
so 
60% * 1 liter
or 0.6 * 1 liter
Now to find the total number of liters of lemon juice and water in the bottle
(0.6*1)+x= 1
(x being the amount of water)

Part B: We can calculate the number of liters of lemon juice that are present in the bottle
60% * 1
0.6 * 1
that is 0.6
So there is 0.6 liters of lemon juice in the bottle

Hope this helps :)
6 0
3 years ago
Here are two number machines, A and B.
Troyanec [42]

Answer:

Step-by-step explanation:

We can write them both like functions like this

Where

x=input

A=Output A

B=Output B

We want the output of A 3 times the output of B this can be written like this:

we replace with the functions

we solve for x

The output that makes the out put of A 3 times teh output of B is

7 0
2 years ago
find the area of each sector. Use the 3.14 as the value of pi. Round your answer to the nearest tenth.​ Part 4
Yuri [45]

Answer:

1) 378.1 in²

2) 8.4 m²

Step-by-step explanation:

Area of sector= \frac{θ°}{360°}  \times \pi {r}^{2}

1) Area of sector

=  \frac{150°}{360°} \times 3.14 \times  {17}^{2}  \\  = 378.1 \: in^{2}  \\ (nearest \: tenth)

2) Area of sector

\frac{60°}{360°}  \times 3.14 \times  {4}^{2}  \\  = 8.4 \: m^{2}  \\ (nearest \: tenth)

7 0
3 years ago
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