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Stels [109]
2 years ago
10

Can you do it step by step for me

Mathematics
2 answers:
noname [10]2 years ago
8 0
Answer: 10
step one: replace r with 7 and a with 2
this will bring you to the equation 7+(2+1)^2 ÷3. (if you don’t know “^2” means squared or to the power of 2)
step 2: do what’s in the parenthesis first following PEMDAS which would be (2+1) and 2+1 is 3. now your equation is 7+3^2 ÷3

step 3: do the exponent, 3^2 is 3*3 which equals 9 so the new equation is 7+9 ÷3

step 4: now you have to do division, 9 ÷3 = 3 so our new equation is 7+3

step 5: addition is last and we have to do 7+3 which is 10 so your answer is 10!


hope this was a good explanation!
liraira [26]2 years ago
7 0

Answer:

= 10

Step-by-step explanation:

r + (s+1)^{2} ÷ 3

if, r = 7 and s = 2

SO..

7 + (2+1)^{2} ÷ 3

..

Add 2 and 1 to get 3.

7 + \frac{3^{2} }{3}

Calculate 3 to the power of 2 and get 9.

7 + \frac{9}{3}

Divide 9 by 3 to get 3.

7 + 3 = 10

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If cos x= 5/13 and sin x <0 find cos (x/2) and sin (2x)
taurus [48]
We know that

if cos x is positive
and
sin x is negative
so
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cos x=5/13
we know that
sin²x+cos²x=1-------> sin²x=1-cos²x------> 1-(5/13)²---> 144/169
sin x=√(144/169)-------> sin x=12/13
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sin x=-12/13

Part A) <span>cos (x/2)
cos (x/2)=(+/-)</span>√[(1+cos x)/2]
cos (x/2)=(+/-)√[(1+5/13)/2]
cos (x/2)=(+/-)√[(18/13)/2]
cos (x/2)=(+/-)√[36/13]
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the angle (x/2) belong to the II quadrant
so
cos (x/2)=-6√√13/13

the answer Part A) is 
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Part B) sin (2x)
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4 0
3 years ago
The cost to park a car in a parking lot is $3.45 per hour. Maleek parked his car for 4 hours on Monday and 3 hours on Tuesday. H
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Step-by-step explanation:

7 0
3 years ago
Use the Graph of the parabola to fill in the table
Andre45 [30]

Answer:

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y intercept is (0,-8)

Step-by-step explanation:

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The x-value that the line passes through here is the point x = -1 and that is the equation of the axis of symmetry

c) The vertex represents the lowest point of the circle here,

As we can see, this is the point through which the axis of symmetry passes through to make a symmetrical division of the parabola

We have the coordinates of this point as

(-1,-9)

d) The intercepts

The x-intercept are the two points in which the parabola crosses the x-axis

We have this point as 2 and -4

The x-intercepts are at the points (2,0) and (-4,0)

For the y-intercept; it is the y-coordinate of the point at which the parabola crosses the y-axis and this is the point (0,-8)

5 0
3 years ago
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