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Readme [11.4K]
3 years ago
8

Sin(60+a)- sin(60-a)

Mathematics
1 answer:
masya89 [10]3 years ago
3 0

Answer:

2Cos (60) sin (a)

Step-by-step explanation:

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ChitChat Wireless charges $0.30 per minute plus a monthly base fee. In September, Maggie used 120 minutes and her bill was $51.
SVEN [57.7K]

Answer:

$C = 0.30(m) + 15

C is bill cost

m is number of minutes used

Step-by-step explanation:

In this question, we are asked to write an equation that estimates the bill cost of Maggie’s phone bills.

We proceed as follows;

Now, let’s try and find the base fee.

We can calculate this using her bill for September.

Mathematically;

Bill = (Cost per minute * total minutes) + Base fee

Here, $0.30 per minute for 120 minutes will yield a total of 120 * 0.3 = $36

This means the base fee would be $51-$36 = $15

Now let’s say the bill is $C, and the number of minutes used is m

Mathematically;

$C = 0.30(m) + 15

5 0
4 years ago
The positions of two divers from the water’s surface after a dive are shown:
zepelin [54]
On the added picture is drawn the vertical coordinate line with origin that is intersection point of the coordinate line and water surface. The positive direction is naturally up and the negative direction - down. The Kris's and Graham's positions are shown on the picture. 

From this coordinate line you can see that -22<-17 and is father from the origin (if one negative number is placed farther from the origin than another negative number, then first number is smaller than second). So, the right choice is C.

8 0
4 years ago
Identify the value of a if<br> y= a (x − 2)(x + 4)<br> and the point (4,8) is on the graph.
strojnjashka [21]
Use mathaway there you go
8 0
3 years ago
What’s the median of 1,1,7,3,2,2,3,5
Ratling [72]
3,2


That’s the answer
3 0
3 years ago
Read 2 more answers
The area of Sahara desert is 7 times the area of the Gobi Desert. If the sum of their areas is 4,000,000 square miles, find the
ryzh [129]
X=area of Sahara.
y=area of the Gobi Desert.
We suggest this system equations:
x+y=4000000
x=7y
solve by susbstitution method.
(7y)+y=4,000,000
8y=4,000,000
y=4,000,000 / 8=500,000

x=7y
x=7(500,000)=3,500,000

The area of Sahara=3,500,00 miles².
The area of the Gobi Desert=500,000 miles²

To check:
Te sum of their areas is : 3,500,000 miles²+500,000 miles²=4,000,000 miles²
Te area of sahara (3,500,000 miles²) is 7 times the area of the Gobi Desert (7*500,000 miles²=3,500,000 miles²).
4 0
3 years ago
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