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son4ous [18]
3 years ago
8

13,14,15,16, and 17 please! Respond as fast as possible Show work for all please!!! Thanks!

Mathematics
2 answers:
katen-ka-za [31]3 years ago
4 0
13.  # books * 2
97 * 2 
A

14.   4.5 km/21 min  = 7.5 km = x min
cross multiply
4.5x = 7.5(21)
4.5x = 157.5
x = 35 min
B

15.  9.60/12 = x/4
cross multiply
12x = 4(9.60)
12x = 38.40
x = 3.20
C

16.  18% move decimal two places to the left and drop the % sign 
0.18
A

17.  d = rt
d = 2(55)
d = 110 miles
150 - 110 = 40 miles remaining
A
netineya [11]3 years ago
3 0
13) A
14)B
15)C
16)A
17)A
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What’s the exact value of Cos(127.5)? Using trig identities like half angle and PLEASE EXPLAIN
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Answer:

−0.608761429

Step-by-step explanation:

use the pathagreom theorem if you have two sides subtract that from 180

8 0
3 years ago
Mary242 made for 11 hours of work.
MAVERICK [17]

We conclude that, if working at the same rate, to make 374 units, she needs to work for 17 hours.

<h3>At the same rate, how many hours would she have to work to make 374?</h3>

We know that Mary makes 242 units of something in 11 hours of work, then her rate of work is:

R = (242 units)/(11 hours) = 22 units per hour.

Now, if she wants to make 374 units, then she needs to work for a time T, such that:

(22 units per hour)*T = 374 units.

Solving that linear equation for T, we get:

T = (374 units)/(22 units per hour) = 17 hours

We conclude that, if working at the same rate, to make 374 units, she needs to work for 17 hours.

If you want to learn more about linear equations:

brainly.com/question/1884491

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5 0
2 years ago
Consider the one-sided confidence interval expressions for the mean of a normal population. Round your answers to 2 decimal plac
ser-zykov [4K]

Answer: a) 0.84  b) 0.67  c) 1.28

Step-by-step explanation:

Using the standard normal distribution table for z-value , we have

(a) The value of z_{\alpha} would result in a 80% one-sided confidence interval : z_{(1-0.80)}=z_{0.20}=0.8416\approx0.84

(b) The value of z_{\alpha} would result in a 85% one-sided confidence interval : z_{(1-0.85)}=z_{0.25}=0.6744897\approx0.67

(c) The value of z_{\alpha} would result in a 90% one-sided confidence interval : z_{(1-0.90)}=z_{0.10}=1.2815515\approx1.28

6 0
3 years ago
Use the graph of the polynomial function to find the factored form of the related polynomial assume it has no constant factor
tensa zangetsu [6.8K]

Answer:

(D)(x-2)(x+2)

Step-by-step explanation:

As raízes do polinômio são 2 e -2, portanto sua forma fatorada tem que ser (x-x1)(x-x2) se x1=2 e x2=-2. Então:

p(x) = (x-2)(x+2)

5 0
3 years ago
Read 2 more answers
A square root function has both x and y intercepts.
Nata [24]

Step-by-step explanation:

Square Root:

The equation will never touch the x - axis or the y - axis,so the function does not have an x - or y- intercept. ...Therefore,the x- and y- intercepts are 0.

I hope it's helpful!

8 0
3 years ago
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