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3 years ago

Which of the following is equivalent to 5 • (7 • 4)?

Mathematics

1 answer:

serg [7]3 years ago

4 0

Answer:

Its (5 x 7) x 4

Step-by-step explanation:

5 x (7 x 4)

5 x (28)

140

------------

(5 x 7) x 4

(35) x 4

140

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Solve by your method of choice.

34kurt

Answer:

Step-by-step explanation:

Given the 2 equations

x³ + y = 0 → (1)

11x² - y = 0 → (2)

Add (1) and (2) term by term to eliminate the term in y

x³ + 11x² = 0 ← factor out x² from each term

x²(x + 11) = 0

Equate each factor to zero and solve for x

x² = 0 ⇒ x = 0

x + 11 = 0 ⇒ x = - 11

Substitute these values into (1) for corresponding values of y

(1) y = - x³

x = 0 ⇒ y = 0 ⇒ (0, 0) is a solution

x = - 11 ⇒ y = - (- 11)³ = 1331 ⇒ (- 11, 1331) is a solution

6 0

3 years ago

HELP BY THURS FEB 4

Alina [70]

Answer: i think its D and E

Step-by-step explanation:

8 0

3 years ago

Find the area of the triangle with the given measurements. Round the solution to the nearest hundredth if necessary. B = 107°, a

Archy [21]

Answer: $105.19 \text{ square cm}$

Step-by-step explanation:

Since, by the SAS formula of finding the area of triangle,

The area of triangle, $A = \frac{1}{2}\times s_1\times s_2\times sin\theta$

Where, $s_1$ and $s_2$ are adjacent sides and $\theta$ is the included angle of these sides

Here, $s_1=22$ $s_2=10$

And, $\theta=107^{\circ}$

Thus, the area of the triangle ABC,

$A = \frac{1}{2}\times 22\times 10\times sin (107)^{\circ}$

$A = 110\times 0.95630475596$

$A = 105.193523156\approx 105.19\text { square cm}$

Therefore, Third Option is correct.

3 0

4 years ago

This year, Maddie's mother is 4 times older than Maddie. Read the story. If Maddie's mother is 33 years older than Maddie, how o

laila [671]

Answer:

Maddie is 8.25 years old.

Step-by-step explanation:

Ma(4)=33

33/4=8.25

Maddie=8.25 yrs old

8 0

4 years ago

Determine the period of this Function.

marysya [2.9K]

Answer:

Step-by-step explanation:

The period is basically the difference in x from one "peak" to the other "peak".

The peaks are the highest points of a sinosodial function, and the figure them out, use the formula:

$|peak_1-peak_2|=period$

We know the first peak is at about x=0 $\pi$

We know the second peak is at about x=4 $\pi$

So plugging this in:

$|0-4\pi |=4\pi$

So the period is $4\pi$

I am assuming "p" stands for $\pi$ , so the answer should be 4p.

There are other ways to find the period, for instance if you are given a sinusodial function in writing instead of a graph.

Here is an example:

5sin(5x+2)+3

If we want to find period, we need to find what we call "b"

b is the number in front of x, which we can identify as bx, which in this case is 5x above.

Now what do we do with this "b"?

This is the value we need to find our period.

If you know b, you can use this formula to find the period:

$\frac{2\pi }{b}=p$

And when we plug in b:

$\frac{2\pi }{5}$

1.257, which would be your period.

THis can also be reworked so that you can find b:

If the formula for period is $\frac{2\pi }{b}=p$ , then the opposite formula would be $\frac{2\pi }{ p}=b$

And when you plug the period you have in:

$\frac{2\pi }{1.257}$

Anyway, your answer is 4p.

Hope this helps!

3 0

3 years ago