Ask question

Ask question

All categories

3 years ago

13

An auditorium has 28 seats in the front row. Each row behind the front has 3 more seats than the row directly in front of it. Ho

w many seats are there in the 11th row?

1 answer:

KIM [24]3 years ago

8 0

Answer:

28+3=31

each seat behind the front seat had 31seats

You might be interested in

Can u answer this question?

Sonja [21]

Answer: 140

Step-by-step explanation:

If no. of apartments are y

35% of y = 49

Y = 4900/35 = 140

7 0

3 years ago

It takes Jeremy 6 hours to paint a room. If it takes 4 hours for Jeremy and Marcus to paint the room together, how long does it

ASHA 777 [7]

Answer:

12 D. Is the answer

Step-by-step explanation:

The equation we will use is

1

6

+

1

x

=

1

4

. Solve the equation by multiplying each term by the LCM of the denominator, 12x. The equation is now 2x + 12 = 3x. We solve and find x = 12. It will Marcus 12 hours to paint the room alone.

7 0

3 years ago

34,258 and 47,163 <br> The value of 4 in------ is ----- times<br> The value of 4 in -------

Mariulka [41]

The value of 4 in 47,163 is 10 times greater than the value of 4 in 34,258.

Each time you move one place over (e.g. tens to hundreds) the number gets 10 times larger if you move to the left and 10 times smaller if you move to the right. So, for example you go from tens to hundreds it is 10 times larger, but if you go from hundreds to tens then it is 10 times smaller.

6 0

3 years ago

I don't need you to work it out, just theorem(s) i need to reach the answer :)

VikaD [51]

Not sure why such an old question is showing up on my feed...

Anyway, let $x=\tan^{-1}\dfrac43$ and $y=\sin^{-1}\dfrac35$ . Then we want to find the exact value of $\cos(x-y)$ .

Use the angle difference identity:

$\cos(x-y)=\cos x\cos y+\sin x\sin y$

and right away we find $\sin y=\dfrac35$ . By the Pythagorean theorem, we also find $\cos y=\dfrac45$ . (Actually, this could potentially be negative, but let's assume all angles are in the first quadrant for convenience.)

Meanwhile, if $\tan x=\dfrac43$ , then (by Pythagorean theorem) $\sec x=\dfrac53$ , so $\cos x=\dfrac35$ . And from this, $\sin x=\dfrac45$ .

So,

$\cos\left(\tan^{-1}\dfrac43-\sin^{-1}\dfrac35\right)=\dfrac35\cdot\dfrac45+\dfrac45\cdot\dfrac35=\dfrac{24}{25}$

7 0

3 years ago

3x+2y=0 <br> x-5y=17<br><br> Solving system using elimination

horsena [70]

(2,-3) is the answer

6 0

3 years ago