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zlopas [31]
3 years ago
11

Calculate the exact value of cos(a−b) given that sin a=12/13 with π/2

Mathematics
1 answer:
Lady bird [3.3K]3 years ago
8 0

Answer:

Step-by-step explanation:

sin ~a=\frac{12}{13} ,\frac{\pi}{2}

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To raise funds, a school sells two kinds of raffle tickets, some for $6 and the rest for $1.50 . Sales for both amounted to $822
MaRussiya [10]
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4 0
3 years ago
Read 2 more answers
Can u plzz help me with my homework
schepotkina [342]
The unit rate for Hakim's car is traveling 30 feet per second (I just simplified 600/20). Then the unit rate for Andre's motorcycle would be 25 feet per second (I simplified 300/12). So in conclusion, Hakim's car is traveling faster. So then, 30 > 25.
6 0
3 years ago
n a jar of coins, the ratio of nickels to dimes is 5:7. If the jar contains 350 dimes, how many nickels are there?
irina1246 [14]

Answer:

250 nickles

Step-by-step explanation:

Nickles and dimes are coins with different currency values. One nickel(N) is equal to 5 cents while one dime(D) is equal to 10 cents. The ratio of nickel:dime is 5:7, to put into the equation it will be:

N/D= 5/7

7N=5D   ---> 1st equation

There are 350 dimes, the equation will be:

D=350   ----> 2nd equation

We can find out the number of nickels by substitute the 2nd equation into the first. The calculation will be

7N=5D

N= 5D/7

N=5(350)/7

N=  250

4 0
3 years ago
Let p= x^2-7.
Advocard [28]

Since p = x² - 7, you can substitute/plug in p for x² - 7

So:

(x² - 7)² - 4x² + 28 = 5

(p)² - 4x² + 28 = 5      You can factor out -4 from (-4x² + 28)

p² - 4(x² - 7) = 5        Plug in p

p² - 4p = 5        Subtract 5

p² - 4p - 5 = 0        Your answer is C

8 0
3 years ago
Which of the following graphs represents the equation below?: -9x – 3y = -8
Mamont248 [21]
It’s C! that’s the answer, hope it helps
7 0
3 years ago
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