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Tju [1.3M]
3 years ago
10

Solve for c solve for r​

Mathematics
1 answer:
expeople1 [14]3 years ago
7 0

Answer:

Step-by-step explanation:

9(c+7)=27

9c+63=27  subtract 63 from both sides

9c=  -36  divide by 9

c= -4

3(2r-8)+4r=76 foil

6r-24+4r=76 combine like terms

10r-24=76 add 24 to both sides

10r+100  divide by 10

r= 10

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Please answer it now in two minutes
nata0808 [166]

Answer:

C = 28.9

Step-by-step explanation:

Given the right angled triangle, ∆BCD, you are required to find the measure of angle C.

Apply the trigonometric ratio formula to find m < C.

Adjacent side = 7

Hypotenuse = 8

Trigonometric ratio formula to apply would be:

cos(C) = \frac{7}{8}

cos(C) = 0.875

C = cos^{-1}(0.875)

C = 28.9

(To nearest tenth)

6 0
3 years ago
Evaluate the function at x = –2.<br><br><br><br> y = 0<br><br> y = 3<br><br> y = –4<br><br> y = 2
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When x=-2, y is equal to 3

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3 years ago
What is the value of k such that 5x-2y=9 and 6x+ky=4 are perpendicular?
max2010maxim [7]

15

5x-2y=9......(1)

6x+ky=4......(2)

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since the line are perpendicular

5/2 * -6/k = -1

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To make one pack of cookies you need 34 cup of butter. How much butter is needed to make 4 1 / 2 pack of cookies?
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