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IRINA_888 [86]
3 years ago
9

Jack is 4 times as old as lacy. 3 years from now the sum of their ages will be 71. How old are they now

Mathematics
1 answer:
Ivenika [448]3 years ago
8 0

jack is 284 and lacy is 71 cuz 71 x 4 is 284

plz mark brainlyest

Bye!

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Which expression is equivalent to 8 (a minus 6)?<br> 8 a minus 48<br> 2a<br> 8 a minus 6<br> 48a
frozen [14]

Answer:

8 a minus 48

Step-by-step explanation:

you need to distribute!!

so you distribute the 8 to both the a and 6

8 times a equals 8 a

8 times 6 equals 48

and so that’s how you get 8 a minus 48 c:

4 0
2 years ago
Set 1: {0, 2, 4, 6, 8, 10}
KIM [24]

Answer:

To find the mean absolute deviation of the data, start by finding the mean of the data set. Find the sum of the data values, and divide the sum by the number of data values. Find the absolute value of the difference between each data value and the mean: |data value – mean|.

Step-by-step explanation:

Calculate Mean Absolute Deviation (M.A.D)

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7 0
3 years ago
The leg of the isosceles triangle is two less than three times the length of its base. If the perimeter of the triangle is 45 m,
choli [55]

Answer:

19 m

Step-by-step explanation:

base=x

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7x-4=45

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7 0
3 years ago
What are the solutions to x2 – 10x = 39?
oee [108]

Answer: x=−3 or x=13

Step-by-step explanation:

Step 1: Subtract 39 from both sides.

x2−10x−39=39−39

x2−10x−39=0

Step 2: Factor left side of equation.

(x+3)(x−13)=0

Step 3: Set factors equal to 0.

x+3=0 or x−13=0

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7 0
3 years ago
Select the correct answer from each drop-down menu.
maxonik [38]

Answer:

(b)\\\tan x, \cot x

Step-by-step explanation:

Given

trigonometric function is

\dfrac{\cos 2x-\cos 4x}{\sin 2x+\sin 4x}

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\Rightarrow \cos C-\cos D=-\sin (\dfrac{C+D}{2})\sin (\dfrac{C-D}{2})\\\\\Rightarrow \sin C+\sin D=\sin (\dfrac{C+D}{2})\cos (\dfrac{C-D}{2})

\Rightarrow \dfrac{\cos 2x-\cos 4x}{\sin 2x+\sin 4x}=\dfrac{2\sin 3x\cdot \sin x}{2\sin 3x\cdot \cos x}\\\\\Rightarrow \dfrac{\sin x}{\cos x}=\tan x

option (b) is correct

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6 0
3 years ago
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