All categories

4 years ago

Help please I don't understand

Mathematics

1 answer:

Darina [25.2K]4 years ago

6 0

Answer:

x = 8
AM = 64 cm
BM = 64 cm
M is the midpoint

Step-by-step explanation:

Part A. The total length of a line segment is the sum of the lengths of its parts.

AM +MB = AB

Substituting the given information, this equation becomes ...

(7x +8) cm + (9x -8) cm = 128 cm

16x = 128 . . . . . . . . . collect terms, divide by cm

x = 128/16 . . . . . divide by the coefficient of x

x = 8

Part B. Then the length of AM is ...

AM = (7x +8) cm = (7(8) +8) cm = (56 +8) cm

AM = 64 cm

Part C. The length of BM is ...

BM = (9x -8) cm = (9(8) -8) cm = (72 -8) cm

BM = 64 cm

Part D. AM = BM = 64 cm, so point M is the midpoint of AB. Point M divides the segment into two equal parts.

You might be interested in

PLEASE HELP!!!!!

LekaFEV [45]

−4 3/7 −4 6/7 −5 3/7 4 2/7 5 1/7

Least to greatest

−5 3/7 −4 6/7 −4 3/7 4 2/7 5 1/7

5 0

4 years ago

Read 2 more answers

What is y equal to when x= -2 Y=-x+4

Alex17521 [72]

Y= -2+4

If X equals -2, you want to plug -2 in for X.

I hope I helped!

5 0

4 years ago

calculate the average rate of change for the given graph from x=-2to x=0 and select the correct answer below

Vitek1552 [10]

Answer:

${ \tt{ \delta x = \frac{x _{2} - x _{1} }{2} }} \\$

substitute for the values of x :

${ \tt{ \delta x = \frac{0 - ( - 2)}{2} = \frac{2}{2} }} \\ \\ { \underline{ \tt{ \: \: \delta x = 1 \: \: }}}$

7 0

3 years ago

A warehouse store sells 4.5-ounce cans of tuna in packages of 3. A package of 3 cans costs $3.78. The store also sells 5.5-ou

Doss [256]

Answer:

6.5 ounce cans for 6.24

Step-by-step explanation:

i don't know how to explain this oki

3 0

3 years ago

Read 2 more answers

What is the value of c in this linear system? A) 1 B) -3 C) -1 D) 2

Alika [10]

9514 1404 393

Answer:

B) -3

Step-by-step explanation:

There are methods for finding only c. Cramer's rule is one of them. It involves finding two determinants and taking their ratio. Here, we choose a more ad hoc approach. It appears that the value of b can be found by combining the last two equations.

(1/2)(2a +4b -2c) -(a -3b -c) = (1/2)(12) -(-4)

5b = 10

b = 2

Now, we can substitute this value into the first two equations. This gives ...

5a +c = -8

a - c = 2

Subtracting 5 times the second from the first gives ...

(5a +c) -5(a -c) = (-8) -5(2)

6c = -18 . . . . simplify

c = -3 . . . . . . divide by 6

The value of c is -3.

4 0

3 years ago

Help please I don't understand​

Help please I don't understand