2 years ago

What is the value of k?

Mathematics

1 answer:

Flura [38]2 years ago

7 0

Answer:

k=10

Step-by-step explanation:

If you need me to explain, just comment below but heres my work:

180-115=65

(4k+5)+(6k+10)+65 = 180

10k+80=180

10k=100

k=10

You might be interested in

Which sample size will produce the widest 95% confidence interval, given a sample proportion of 0.5?

valentinak56 [21]

Answer:

D. 50

Step-by-step explanation:

Width: 2z × sqrt(var/n)

Interval is wider when:

z is higher

n is smaller

In the options, least value of n is 50

3 0

3 years ago

-59_________-60 < > =

OLga [1]

Answer:

Step-by-step explanation:

-59 is bigger than -60. If you think about it on a number line, it is bigger.

By the way, can you follow me on Brainly?

Thanks!

3 0

2 years ago

Read 2 more answers

During the half time of a basketball game, a sling shot launches T-shirts at the crowd. The T-shirt is launched with an initial

kumpel [21]

Step-by-step explanation:

The T-shirt is launched with an initial upward velocity of 60 ft/s from a height of 5 feet. Its equation of motion is given by :

$f(x) = -12x^2 + 60x + 5$ ....(1)

(a) For maximum height, put $\dfrac{df(x)}{dt}=0$

So,

$\dfrac{ d(-12x^2 + 60x + 5)}{dt}=-24x+60$

Now put,

$-24x+60=0\\\\x=2.5\ s$

So, the time taken for the T-shirt to reach maximum height is 2.5 seconds.

(b) Put x = 2.5 s in equation (1)

$f(x=2.5) = -12(2.5)^2 + 60(2.5) + 5\\\\f(x)=80\ \text{feet}$

8 0

2 years ago

My question is (1.35)(27)(0)(13)

Trava [24]

(1.35)(27)= 36.45(0) = 0 (13) = 13

6 0

3 years ago

Read 2 more answers

What is the length of segment AB?

allochka39001 [22]

The answer to this question is 8

4 0

3 years ago

Read 2 more answers