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garik1379 [7]
2 years ago
8

How many solutions are there to the equation below?

Mathematics
1 answer:
mote1985 [20]2 years ago
4 0
Anwer is C. Infinitely many solutions <33
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What is the area of this parallelogram? A = 20 ft² A=2123 ft² A=3313 ft² A=4123 ft².
cluponka [151]

Answer:

Step-by-step explanation:

where's the parallelogram?

4 0
2 years ago
BRAINLIEST!!! +15 POINTS!!! REAL ANSWERS ONLY!!!
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Answer:

1.

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3 0
3 years ago
Read 2 more answers
-y-4=4x<br> put in y=mx+b
marishachu [46]

-y-4=4x\\ \\ -y=4x+4\\ \\ y=-4x-4

<h3>First part of the problem:</h3><h3>-y - 4 = 4x</h3><h3>    + 4   + 4</h3><h3>-y + 0 = 4x + 4</h3><h3>      -y = 4x + 4</h3><h3 />

Hope this helps!

3 0
3 years ago
If the sum of the even integers between 1 and k, inclusive, is equal to 2k, what is the value of k?
Alisiya [41]
If k is odd, then

\displaystyle\sum_{n=1}^{\lfloor k/2\rfloor}2n=2\dfrac{\left\lfloor\frac k2\right\rfloor\left(\left\lfloor\frac k2\right\rfloor+1\right)}2=\left\lfloor\dfrac k2\right\rfloor^2+\left\lfloor\dfrac k2\right\rfloor

while if k is even, then the sum would be

\displaystyle\sum_{n=1}^{k/2}2n=2\dfrac{\frac k2\left(\frac k2+1\right)}2=\dfrac{k^2+2k}4

The latter case is easier to solve:

\dfrac{k^2+2k}4=2k\implies k^2-6k=k(k-6)=0

which means k=6.

In the odd case, instead of considering the above equation we can consider the partial sums. If k is odd, then the sum of the even integers between 1 and k would be

S=2+4+6+\cdots+(k-5)+(k-3)+(k-1)

Now consider the partial sum up to the second-to-last term,

S^*=2+4+6+\cdots+(k-5)+(k-3)

Subtracting this from the previous partial sum, we have

S-S^*=k-1

We're given that the sums must add to 2k, which means

S=2k
S^*=2(k-2)

But taking the differences now yields

S-S^*=2k-2(k-2)=4

and there is only one k for which k-1=4; namely, k=5. However, the sum of the even integers between 1 and 5 is 2+4=6, whereas 2k=10\neq6. So there are no solutions to this over the odd integers.
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3 years ago
Haddie makes and sells knit scarves. Next week she will pay a $25 fee for the use of a booth at a craft fair. She will charge $1
Serggg [28]
The answer is 25 + 12x
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