All categories

3 years ago

If U is the midpoint of CB, CU=18, and CB= 2x-10, then find x

Mathematics

2 answers:

Inessa [10]3 years ago

5 0

Answer:

x = 23

Step-by-step explanation:

CU + UB = CB

Since U is the midpoint that means CU = UB = 18

18+ 18 = 2x-10

36 = 2x-10

Add 10 to each side

36+10 = 2x

46 =2x

Divide by 2

23 = x

ArbitrLikvidat [17]3 years ago

5 0

Answer:

Step-by-step explanation:

CB/2 = CU

CB = (2)CU

2x - 10 = (2)18

2x - 10 = 36

Add 10 on both sides.

2x = 46

Divide both sides by 2.

x = 23

You might be interested in

Can someone help me with this

drek231 [11]

The answer would be letter B

7 0

3 years ago

What is (81x^2 -4y^2) square units factored?

slavikrds [6]

To solve, use the difference of squares rule. (a^2-b^2)=(a-b)(a+b). In your equation, your a^2=81x^2 and your b^2=4y^2, making your a=9x and your b=2y. This makes your factored form (9x-2y)(9x+2y).

4 0

2 years ago

A car travels at an average speed of 80 km/h for 6 hours.

guapka [62]

Answer:

63km/h

Step-by-step explanation:

devide 80 km/h over 6hrs and get 13 ... subtract 13 from 80 km/h and get 63 km/h

6 0

1 year ago

What is the slope of the line tangent to the curve y+2 = (x^2/2) - 2siny at the point (2,0)?

Aleksandr-060686 [28]

Implicit differentiation
take the deritivive with respect to x

first
y+2=(1/2)(x^2)-2sin(y)
take deritivitive
dy/dx+0=1/2(2x)-2(cosy)dy/dx
dy/dx=x-2cosy(dy/dx)
add 2cosy(dy/dx) to both sides
dy/dx+2cosy(dy/dx) =x
undistribute dy/dx
dy/dx(1+2cos(y))=x
divide both sides by 1+2cos(y)
$\frac{dy}{dx}= \frac{x}{1+2cos(y)}$
at (2,0)
x=2
y=0

$\frac{dy}{dx}= \frac{2}{1+2cos(0)}$
$\frac{dy}{dx}= \frac{2}{1+2(1)}$
$\frac{dy}{dx}= \frac{2}{1+2}$
$\frac{dy}{dx}= \frac{2}{3}$
the slope is 2/3

6 0

2 years ago

11 feet<br>9 feet<br>5 feet<br>6 feet <br>how many square feet

Minchanka [31]

You need to put the whole question but I have a question like this and it’s 9 feet

4 0

3 years ago