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allochka39001 [22]
3 years ago
7

Plz plz pls help pls

Mathematics
2 answers:
Damm [24]3 years ago
8 0

Answer:

<h2>52 + 4 = 4 + 52</h2>

Step-by-step explanation:

<h2>Hope that will help you</h2>
vlabodo [156]3 years ago
3 0

Answer:

The second choice.

Step-by-step explanation:

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Simplify the algebraic expression.<br> 2v−8(3+2v)
ra1l [238]

Answer: -14v-24

Step-by-step explanation:

2v-8(3+2v)

2v-(24+16v)

2v-24-16v

-14v-24

3 0
2 years ago
Read 2 more answers
The total money earned if Lee sold four scarves at twenty dollars each.
leonid [27]

Answer:

$80

Step-by-step explanation:

If we have four scarves, and each costs $20, we can multiply these two numbers to find the total profit made.

20\cdot4

2 times 4 is 8, and adding a 0 to that is 80.

Hope this helped!

3 0
3 years ago
An experiment involves 17 participants. From these, a group of 3 participants is to be tested under a special condition. How man
lakkis [162]

Answer: 680

Step-by-step explanation:

When order doesn't matter,then the number of combinations of choosing r things out of n = ^nC_r=\dfrac{n!}{r!(n-r)!}

Given: Total participants = 17

From these, a group of 3 participants is to be tested under a special condition.

Number of groups of 3 participants chosen = ^{17}C_3=\dfrac{17!}{3!(17-3)!}\

^{17}C_3=\dfrac{17!}{3!(17-3)!}\\\\=\dfrac{17\times16\times15\times14!}{3\times2\times14!}\\\\=680

Hence, there are 680 groups of 3 participants can  be chosen,.

8 0
4 years ago
The perimeter of a rectangle is 42 cm. The width is 7 cm less than the length.
lara [203]

Answer:

<h2>Length = 14</h2><h2>Width =7</h2>

Step-by-step explanation:

Let \:the\:length\:be \:x\\Perimeter = 42 cm\\Width = x -7\\\\P = 2(l+b)\\\\42 = 2(x+(x-7))\\\\42 = 2(x +x-7)\\42 = 2(2x-7)\\42 = 4x -14\\Collect\:like\:terms\\\\42+14=4x\\56 = 4x\\\\Divide \:both\:sides\:of\:the\:equation\:by \:4\\\frac{56}{4} = \frac{4x}{4} \\\\14 =x\\Length = 14\\Width = x-7\\Width = 14-7\\\\Width = 7

7 0
3 years ago
Read 2 more answers
Izzy hits a ball of a tee 2 feet off the ground, with an initial velocity of 64 feet per second. What will be the maximum height
OLEGan [10]

Answer:

Step-by-step explanation:

I figured this out with calculus since it's easier that way. The position function for the ball is

s(t)=-16t^2+64t+2. The first derivative of position is velocity, so we need to find the first derivative of the position function which is

v(t) = -32t + 64

Now, where the ball is at its highest point is where the velocity is equal to 0, so setting the velocity function equal to 0 allows us to determine how many seconds it takes to get to that max height.

0 = -32t + 64 and

-64 = -32t so

t = 2 seconds. It takes 2 seconds to get to its max height. In order to determine that max height, we sub 2 in for t in the position function:

s(2)=-16(2)^2+64(2)+2 and

s(2) = 66 feet. The max height of the ball is 66 feet.

7 0
3 years ago
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