2 years ago

Solve for x 5x + 7 = 11 Give your answer as a fraction in its simplest form.

Mathematics

1 answer:

Rainbow [258]2 years ago

6 0

Step-by-step explanation:

5x=11-7

5X= 4

X=4/5

=0.8 Answer

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A stick 43 inches long is broken into two pieces, so that one piece is twice as long as the other. How long are the two pieces?

allsm [11]

Answer:

One piece is $\frac{43}{3}$ inches and another piece is $\frac{86}{3}$ inches

Step-by-step explanation:

Let smaller piece length be $s$

Let larger piece length be $l$

Since total of two pieces is 43, we can write:

$s+l=43$

Also, one piece is twice as long as the other (so longer piece is definitely twice as the short piece), we can write:

$l=2s$

Substituting equation 2 into equation one, we can solve for s:

$s+l=43\\s+(2s)=43\\3s=43\\s=\frac{43}{3}$

Thus longer piece is:

$l=2s=2(\frac{43}{3})=\frac{86}{3}$

3 0

3 years ago

What figure can be made with exactly 420 squares?

Natali [406]

5. The 5th figure will have 30 tiles.
6. The 6th figure will have 42 tiles.
7. The pattern is non-linear (quadratic).
8. The 20th figure can be made with 420 tiles.

_____
The Nth figure is made with n*(n+1) tiles. To answer question 8, you must solve
.. n(n +1) = 420
.. n^2 +n -420 = 0
.. (n +21)(n -20) = 0
.. n = 20 or -21 . . . . the negative solution is extraneous

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2 years ago

Which of the following expressions has a value of 3? Select all that apply.

Tpy6a [65]

It would be (-1)(-3) :))

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2 years ago

Which parabola will have a minimum value vertex?

mars1129 [50]

All parabolas?

explanation:

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2 years ago