All categories

3 years ago

Subtract and simplify.

Mathematics

2 answers:

slamgirl [31]3 years ago

8 0

It is the last option the
4y^2-10y-1

Anestetic [448]3 years ago

6 0

$(y^2-7y-5)-(-3y^2+3y-4)$
$=y^2-7y-5+3y^2-3y+4$
$=3y^2+y^2-7y-3y-5+4$
$=4y^2-10y-1$

In short, the answer would be $4y^2-10y-1$ (Option D).

Hope this helps !

Photon

You might be interested in

PLZ HElP!!! Simplify 10 – 3x – 13 + 5x 3 – 3x 1 2x – 3 3 – 2x

777dan777 [17]

the answer to the first part is 2x-3

4 0

3 years ago

Which ordered pair is the best estimate for the solution to the system

Vera_Pavlovna [14]

Answer:

The best estimate of the solution ordered pair from the graph is $(\frac{1}{2},0)$ .

Step-by-step explanation:

See the attached graph to this question.

The graph of two straight lines are shown in the graph.

Now, the two straight lines intersect on the x-axis, so the solution ordered pairs should have y-value equals to zero.

But, there are two ordered pairs with y-value zero and they are $(\frac{1}{2},0)$ and $(\frac{1}{3},0)$ .

The best estimate of the solution ordered pairs from the graph is $(\frac{1}{2},0)$ .

So, this is the solution. (Answer)

7 0

2 years ago

What is the length of AC?

sladkih [1.3K]

When the question says that triangle ABC ~ triangle DEF, that means the triangles are similar. This means that their proportions are the same.
In triangle ABC, side length AB is the equivalent of side length DE in triangle DEF.

Since the proportions must be the same, we can take the known side from triangle ABC, find the equivalent of it on triangle DEF, and find the proportions.
We already found that side length AB ~ side length DE.
Now we can divide the lengths to find the proportions.
28 / 8 = 3.5
This means that each side on triangle ABC will be 3.5 times greater than the equivalent side on triangle DEF.

The length of AC in triangle ABC is 3.5 times the length of DF in triangle DEF.
Side length DF is 10.
Multiply 3.5 by 10 to get the length of AC.
3.5 • 10 = 35
So the length of AC is 35 units.

Answer:
Side length AC in triangle ABC is 35 units.

Hope this helps!

7 0

3 years ago

The Atlantic Salmon swim upstream at a steady rate of 2 miles every 3 minutes. Fill in the table to describe the relationship. R

Likurg_2 [28]

The distance traveled by the Salmon is proportional to the duration spent

swimming.

A table of the distance traveled by the Atlantic Salmon is presented as follows;

$\begin{tabular}{|c|c|c}\underline{Time in minutes}&\underline{Miles Traveled at 2/3 miles per minute } \\1&2/3 \\2&4/3\\3&2\\4&8/3\\5&10/3\\6&4\end{array}$

Reasons:

The given parameter are;

The steady rate at which Atlantic Salmon swims = 2 miles in 3 minutes

Distance the Salmon swims, d ∝ Time taken, t

Therefore;

d = s·t

Where;

s = The constant of proportionality = The speed

Which gives;

$\displaystyle s = \mathbf{\frac{Distance, \, d}{Time, \, t}}$

The speed with which the Atlantic Salmon swims per minute is therefore;

$\displaystyle The \ speed = \mathbf{\frac{2 \ miles}{3 \ minutes}} = \frac{2}{3} \ miles /minute$

The distance travelled, <em>d</em>, is given as follows;

$\displaystyle d = \mathbf{\frac{2}{3} \times t}$

A table showing the distance travelled by the fish with time is presented as follows;

$\begin{tabular}{|c|c|c|}\underline{Time, t, in minutes}&\underline{t \times d}&\underline{Miles Traveled, d, at 2/3 miles per minute } \\1&1 \times 2/3 = 2/3&2/3 \\2&2 \times 2/3 = 4/3&4/3\\3&3 \times 2/3 = 2&2\\4&4 \times 2/3 = 8/3&8/3\\5&5 \times 2/3 = 10/3&10/3\\6&6 \times 2/3 = 4&4\end{array}$

Learn more about constant of proportionality here:

brainly.com/question/11703625

8 0

2 years ago

I have a LOT of trouble in math. Can you guys help me with these questions? thanks

ASHA 777 [7]

1. 5/8 + 1/8 = 6/8 --> 3/4

3. - 1/4+ 3/4:

-0.25+0.75= 0.5 OR 1/2

5. 5/9 + 5/9 = 10/9 --> 1 whole 1/9

7. 3/10 + 1/10 = 4/10 --> 2/5

9. 7/15 + 4/15 = 11/15

And I simplified them too :P

Also this is ez, to me :PP

3 0

2 years ago