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Pani-rosa [81]
3 years ago
12

Solve the system of equations algebraically. Show all of your steps. y=x^2+2x y=3x+20

Mathematics
1 answer:
alexira [117]3 years ago
6 0

Answer:

I'm pretty sure its y = x^2 + 5x + 20

Step-by-step explanation:

This is because i added them (or combined)

Like this

x^2 + 2x

+ 3x + 20

________

x^2 + 5x + 20

Please Correct Me If I Am Wrong Okay love.

Again sorry if i'm wrong.

I'm pretty sure i'm not.

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-n+(-4)-(-4n)+6<br><br><br> solve
tigry1 [53]

Answer:

3n + 2

Step-by-step explanation:

-n+(-4)-(-4n)+6

= -n -4 +4n +6        [positive plus negative =  negative; ∴  +(-4) = -4

=4n - n +6 - 4                      negative plus negative = positive; ∴ -(-4n) = 4]

now subtract n from 4n and subtract 4 from 6

=3n + 2

                                                                                                       

                             

8 0
3 years ago
Read 2 more answers
If you go on a road trip of 270 miles in the mountains and 7/ 10 of the trip is downhill, how many miles of the trip are not dow
skelet666 [1.2K]

Answer:

81 miles

Step-by-step explanation:

From the question 7/10 of the trip has been said to be downhill. It therefore means that 3/10 is not downhill.

Miles = 270

Downhill = 7/10

Not downhill = 3/10

Now we have To calculate Miles that are not downhill (uphill)

But first I calculated for the number of downhill miles

270x7/10

Downhill = 189 miles

To get the number of not downhill miles

I subtracted 189 from the total number of miles on the question.

270 - 189

= 81 Miles.

Therefore 81 Miles of the trip are not downhill.

If you have anymore questions or need clarity please let me know on the comment section. Thank you and Good luck!

7 0
3 years ago
Read 2 more answers
11b-12&lt;-100
ruslelena [56]

Answer:

ok wait which symbol? this (<)?

well it should stay the same since -100 is greater than the 11b-12

LHS=RHS

11b÷11b b must cancell b also do the same on -12. -12÷11 will give u a lesser value compared to -100

prove me wrong

4 0
3 years ago
Read 2 more answers
Geometry help ASAP!!!! Not sure why the answer options are vertical, but oh well.
natita [175]

Answer:

114


Step-by-step explanation:


3 0
3 years ago
Read 2 more answers
1 hour = 3600 seconds and 1 mole = 5,280 feet. Make a conjecture about how you could convert a speed of 15 miles per hour to fee
Keith_Richards [23]
We know that speed (rate) is equal to distance over time.

The current unit of distance is miles, and we want to convert it to feet. The unit of time is hours, and we want seconds. In order to do this, we need to create a conversion factor.

Since 1 \ mi = 5,280 \ ft and 1 \ hr = 3,600 \ s, we will use these are our conversion factors.

The goal in a dimensional analysis problem like this is for your units to work out. Remember, we want feet per second.

We write speed =  \dfrac{15 \ mi}{hr} *  \dfrac{5,280 \ ft}{1 \ mi} *  \dfrac{1 \ hr}{3,600 \ s} \\  \\ speed =  \dfrac{22 \ ft}{s}.

You may wonder why in the conversion factor, we chose to put feet over miles and hours over seconds. This is again because we want our units to cancel. If you have one unit the numerator and the same one in the denominator, the units cancel out.

In sum, the answer is 22 ft/s.
3 0
3 years ago
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