2 years ago

What is the value of x?

1 answer:

6 0

First need to find the length of line LJ

Line LJ = 8sqrt2 * sin(30) = 5.6569

now use that to find x

x = 5.6569 * sin(45) = 4

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Half of your baseball card collection got wet and was ruined. You bought 9 cards to replace some that were lost. How many did yo

PtichkaEL [24]

solution:

n/2 + 9 = 20

n/2=20-9

n/2=11

n=22

6 0

2 years ago

The altitude of a triangle is increasing at a rate of 1 cm/min while the area of the triangle is increasing at a rate of 2 cm2/m

Mnenie [13.5K]

Answer:

The base is reducing at a rate of 3.4cm per min.

Step-by-step explanation:

Let The Height of the Triangle, h

Area of the triangle = A

Area of a Triangle, $A= \frac{1}{2}bh$

When $A=190 cm^2, h=10cm$

$190= \frac{1}{2}*b*10\\b=38cm$

$\frac{dA}{dt}=\frac{1}{2}h\frac{db}{dt}+ \frac{1}{2}b\frac{dh}{dt}\\\frac{dh}{dt}=1 cm/min, \frac{dA}{dt}=2cm^2/min,$

$2=\frac{1}{2}*10*\frac{db}{dt}+ \frac{1}{2}*38*1\\2=5\frac{db}{dt}+19\\2-19=5\frac{db}{dt}\\-17=5\frac{db}{dt}\\\frac{db}{dt}=-\frac{17}{5} =-3.4 cm/min$

The base is reducing at a rate of 3.4cm per min.

8 0

2 years ago

Solve by substitution <br> 1. 6x+ 5y=7 x-y=3<br> 2. 3a +2b =4 2a + b=6<br> 3. 2x + y= 4 4x -y=2

Juli2301 [7.4K]

Answer:

1. y = 11

x = -48

2. a =8

b= -10

3. x= 1

y= 2

Step-by-step explanation:

1 . 6x + 5y = 7

x-y= 3

6x+5y = 7

6x-6y =18

-1y = - 11

6x + 5y = 7

y = 11

6x + 55 = 7

6x = -48

x = -48

8 0

2 years ago

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lana66690 [7]

Answer:

W=2/(P-2L)

Step-by-step explanation:

4 0

3 years ago

Order the set of numbers from least to greatest 64 8 1/7 8.14 15/2

Marianna [84]

Answer:

Step-by-step explanation:

1/7 15/2 8 8.14 64

4 0

2 years ago