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vaieri [72.5K]
2 years ago
8

Find the value of the expression 9 x 7 + 8 divided by 2

Mathematics
1 answer:
Softa [21]2 years ago
4 0

Answer:

35.5 i'm pretty sure

Step-by-step explanation:

because 9 times 7 is 63.  63 plus 8 is 71 and 71/2 is 35.5

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Find the circumference of a circle whose area is equal to 64π^2​
PilotLPTM [1.2K]

Answer:

14 6/7 is the circumference

Step-by-step explanation:

you first of all look for the radius using the formulae multiply both sides by the reciprocal of 22/7

7/22 ×22/7r=64×7/22=224/11{2 4/11)

2 4/11 is the radius

cir =2×22/7×2 4/11

2×22/7× 26/11=104/7

==== =14 6/7

all i can do but am not sure sorry

7 0
1 year ago
How many seconds are in 45 minutes?
fgiga [73]
45 minutes equal to 2700 seconds.
8 0
3 years ago
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3<br> 厂<br> = 2<br> Estimate root
Tcecarenko [31]
The answer to this would be 6
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3 years ago
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For 0 ≤ θ &lt; 2 π what are the solutions to sin^2(θ) =2sin^2(θ/2)
gregori [183]

Recall the half-angle identity for sine,

sin²(x/2) = (1 - cos(x))/2

Then the given equation is identical to

sin²(θ) = 1 - cos(θ)

Also recall the Pythagorean identity,

sin²(θ) + cos²(θ) = 1

Then we rewrite the equation as

1 - cos²(θ) = 1 - cos(θ)

Factoring the left side, we have

(1 - cos(θ)) (1 + cos(θ)) = 1 - cos(θ)

and so

(1 - cos(θ)) (1 + cos(θ)) - (1 - cos(θ)) = 0

and we factor this further as

(1 - cos(θ)) (1 + cos(θ) - 1) = 0

which gives

cos(θ) (1 - cos(θ)) = 0

Then either

cos(θ) = 0   or   1 - cos(θ) = 0

cos(θ) = 0   or   cos(θ) = 1

[θ = arccos(0) + 2nπ   or   θ = -arccos(0) + 2nπ]

…   or   [θ = arccos(1) + 2nπ   or   θ = -arccos(1) + 2nπ]

(where n is any integer)

[θ = π/2 + 2nπ   or   θ = -π/2 + 2nπ]   or   [θ = 0 + 2nπ]

In the interval 0 ≤ θ < 2π, we get three solutions:

• first solution set with n = 0   ⇒   θ = π/2

• second solution set with n = 1   ⇒   θ = 3π/2

• third solution set with n = 0   ⇒   θ = 0

So, the first choice is correct.

6 0
2 years ago
What is the t-intercept of the line shown below?
larisa86 [58]

Answer:

the y intercept is 2

Step-by-step explanation:

its when the slope passes through the y-axis

6 0
2 years ago
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