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Luden [163]
3 years ago
15

If the sin 30° is 1 over 2, then the cos ____° = _____.

Mathematics
2 answers:
Ahat [919]3 years ago
8 0

Answer:

Below.

Step-by-step explanation:

(sine) sin=30=1/2

=cos [90-30]

Which means cos=60

Same as:

(cosine) cos=60=1/2 or Sin30=Cos 60=1/2

Hence, the answer is...

cos 60° = ½....

By:✨ RobloxYt ✨

kotykmax [81]3 years ago
6 0

Step-by-step explanation:

The sine of an angle is the same as the cosine of its complement.

If sin 30° = ½, then cos 60° = ½.

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JA mattress store in Stafford purchased a mattress at a cost of $255 and marked it up 100%. Later on, Cassie bought the mattress
goldenfox [79]

Answer:

She pays $566.10

Step-by-step explanation:

The mattress store marks a mattress up 100%. 100% of $225 is 225. We add 225 to 225 and get 510. Therefore, the store sells the mattress for $510 without tax. When Cassie buys the mattress, we have to add 11% tax. We change 11% to 0.11 and multiply that by the selling price (510). We get 56.10, so that is the tax. We add the tax to the selling price and get $566.10. Cassie pays $566.10 for the mattress.

I hope this helped and please mark me as brainliest!

6 0
3 years ago
Elizabeth can run 3/4 mile in 1/10 of an hour. What is her speed in miles per hour?
Temka [501]
0.75 miles per hour I think....
7 0
3 years ago
Please help. I’ll mark you as brainliest if correct!
r-ruslan [8.4K]

Answer:

650 Country A Dollars

Step-by-step explanation:

1 Country B Dollar = 1.3 Country A Dollar

Country A Dollars for 500 Country B Dollars = 500 x 1.3 = 650

5 0
3 years ago
Which fraction is in the simplest form of 224/360?
barxatty [35]
28/35 which u can't go any further than this bc 35 isn't divisible by 2 nor is 28 divisible by 5 
5 0
3 years ago
A plane is descending into the airport. After 5 minutes it is at a height of 6500 feet. After 7 minutes it is at a height of 590
Jet001 [13]

Let's assume

height of plane  in feet =h

time in minutes =t

we are given

A plane is descending into the airport. After 5 minutes it is at a height of 6500 feet

so, we get one point as (5,6500)

After 7 minutes it is at a height of 5900 feet

so, we get another point as (7,5900)

we can use point slope form of line

y-y_1=m(x-x_1)

points as

(5,6500)

x1=5, y1=6500

(7,5900)

x2=7 , y2=5900

Calculation of slope(m):

m=\frac{y_2-y_1}{x_2-x_1}

now, we can plug values

m=\frac{5900-6500}{7-5}

m=-300

Equation of line:

we can use formula

y-y_1=m(x-x_1)

we can plug values

h-6500=-300(t-5)

h=-300t+8000

Time of landing:

we can set h=0

and then we can solve for t

h=-300t+8000=0

t=\frac{80}{3}min..............Answer

5 0
4 years ago
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