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hoa [83]
3 years ago
10

Which ordered pair is a solution of the equation? -4r +7= 2y - 3

Mathematics
1 answer:
Mars2501 [29]3 years ago
6 0

Answer:

y=-8, r= 2. this is your answer

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I need help. tomorrow i have my state test.
iren [92.7K]

just count how many there and and eliminate one by one

6 0
3 years ago
Pls help if you’re good at trigonometry tysm! Best answer is brainliest!
ExtremeBDS [4]

Answer:

7) a = 65; b = 50

8) c = 125; d = 55; e = 52

9) f = 105

Step-by-step explanation:

7)

a = 65

b + 130 = 180

b = 50

8)

c = 125

d + 125 = 180

d = 55

e = 52

9)

(180 - f) + 32 + (180 - 107) = 180

180 - f + 32 + 180 - 107 = 180

-f + 285 = 180

-f = -105

f = 105

5 0
3 years ago
Read 2 more answers
How many ways can you make 65 cents using nickels dimes and quarters
Neporo4naja [7]

Answer:

14 ways in all.

Step-by-step explanation:

A. If you use 2 quarters, you have to make the remaining 15� with either no

dimes or 1 dime and the rest in nickels.

That's 2 ways.

B. If you use 1 quarter, you have to make the remaining 40� with either no

dimes, 1 dime, 2 dimes, 3 dimes or 4 dimes and the rest, if any, in nickels.

That's 5 more ways.  

C. If you don't use any quarters, you have to make the entire 65� with either

0, 1, 2, 3, 4, 5 or 6 dimes and the rest in nickels.

That's 7 more ways.  2+5+7 = 14 ways in all.

4 0
3 years ago
Uhm what is the mean of 0,3,6,7,9??
jarptica [38.1K]

Answer:

5

Step-by-step explanation:

0+3+6+7+9=25

25/5=5

6 0
3 years ago
Read 2 more answers
Prove that, in a right triangle with a 15° angle, the altitude to the hypotenuse is one fourth of the hypotenuse.
igomit [66]

Consider the attached figure. If AB has length 1, then BC has length sin(15°) and CD (the altitude of triangle ABC) has length sin(15°)·cos(15°).

By the double angle formula for sin(α), ...

... sin(2α) = 2sin(α)cos(α)

Rearranging, this gives

... sin(α)·cos(α) = sin(2α)/2

We have

... CD = sin(15°)·cos(15°) = sin(2·15°)/2

... CD = sin(30°)/2 = (1/2)/2 = 1/4

That is, the altitude, CD, is 1/4 the hypotenuse, AB, of triangle ABC.

3 0
3 years ago
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