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3 years ago

Solve - 8+ (15 - 3)/4

Mathematics

1 answer:

Blizzard [7]3 years ago

3 0

Answer:

Step-by-step explanation:

15-3= 12

12+8 =20

20/4 =5

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Which phrase describes an unknown or changeable quantity?

Assoli18 [71]

Hello!

An unknown or changeable quantity is a variable. We can write these expressions below and see which one has a variable.

A. 15

B. 60(5)

C. 2p

D. $3.76

As you can see, we do not know how many pages are in the book. Therefore, our answer is C.

I hope this helps!

4 0

3 years ago

Read 2 more answers

The midpoint of AB is M (5, 6). If the coordinates of A are (3, 8), what are the

viktelen [127]

Answer:

(7, 4)

Step-by-step explanation:

$\text{Let the coordinates of B } = x_{B} , y_{B} \\\text{Let the coordinates of A} = x_{A} , y_{A} \\\text{Let the coordinates of midpoint M} = x_{M} , y_{M}$

By the midpoint formula,
$(x_{M},y_{M}) = (\frac{x_{A} + x_{B}}{2} , \frac{y_{A} + y_{B}}{2} )$

$x_{M} = \frac{x_{A} + x_{B}}{2} \\y_{M} = \frac{y_{A} + y_{B}}{2} \\$

We have coordinates of midpoint as (5, 6) and coordinates of A as (3,8)
So
$5 = \frac{3 + x_{B}}{2} \\\\\\textrm{Cross-multiplying } 10 = 3 + x_{B}} \textrm{ or } x_{B} = 10-3 = 7\\$

$6 = \frac{8 + y_{B}}{2} \\\\\\\\textrm{Cross-multiplying } 12 = 8 + y_{B}} \textrm{ or } y_{B} = 12-8 = 4\\$

So coordinates of B are (7,4)

3 0

2 years ago

The sum of two numbers is 67. The larger number is 4 more than 2 times the smaller. What are the two numbers?

Paha777 [63]

X,y - two numbers (x > y)

(1) x + y = 67 ⇒ x = 67 - y
(2) x - 4 = 2y

subtitute (1) to (2)

67 - y - 4 = 2y
63 - y = 2y |add y to both sides
63 = 3y |divide both sides by 3
y = 21

subtitute the value of y to (1)

x = 67 - 21 = 46

Answer: 21 and 46.

6 0

3 years ago

Can anyone figure out this...55% of what is 33?

PSYCHO15rus [73]

55% of 60 is 33......

5 0

3 years ago

Read 2 more answers

Find the slope of the line passing through the points (3, 4) and (8,-3).

Verizon [17]

Answer:

-1.4