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3 years ago

Will mark brainlist

Mathematics

2 answers:

Yakvenalex [24]3 years ago

5 0

Answer:

Step-by-step explanation:

Line up and subtract

Then put 2nd number over 1st number

Reduce if possible

Then done

Start:

(-2,-8)

minus

(-3,-9)

----------

1 1

1/1=1

andrew11 [14]3 years ago

3 0

-9 -(-8) / -3-(-2) = -1/-1 = 1

The answer is C. 1 hope this helps!

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Maria calls her mother 5 times every week. Let w represent the number of weeks and c represent the total number of times Maria c

galina1969 [7]

Answer:

Equation: 5w = c

Step-by-step explanation:

${ \tt{w \: \alpha \: c}} \\ { \tt{w = kc}}$

k is a constant of proprtionality

${ \tt{1 = (k \times 5)}} \\ { \tt{k = \frac{1}{5} }}$

» Therefore, equation becomes:

${ \tt{w = \frac{1}{5}c }} \\ \\ { \boxed{ \tt{5w = c}}}$

8 0

3 years ago

Find the circumference of a circle that has an area of 452.16 square meters. (Use 3.1416 as the value of π.) A. 37.6992 meters B

Leto [7]

Answer:

Option C

Step-by-step explanation:

Given that area of a circle = 452.16 sq metres

Hence radius = $\sqrt{\frac{452.16}{3.1416} } =11.9969 m$

After rounding off we get radius = 12metres

To find circumference

We know that circumference of a circle = 2pir

= $2(3.1416)(11.99694)=75.3984 m$

Option C is right

Option D is right

5 0

3 years ago

Read 2 more answers

A motorboat can travel 35mph in still water. If the boat can travel 7 miles downstream at the same time it takes to travel 3 mil

LenaWriter [7]

Answer: the rate of the river's current is 14 mph.

Step-by-step explanation:

Let x represent the rate of the river's current.

The speed of the motor boat in still water is 35 mph.

Since the boat travelled more miles downstream than upstream at the same time, it means that while going downstream, it moved in the direction of the current and while going upstream, it moved against the direction of the current. The total speed downstream would be

(35 + x) mph and the total speed upstream would be (35 - x) mph.

Time = distance/speed

If the boat can travel 7 miles downstream, the time spent travelling downstream is

7/(35 + x)

At the same time it takes to travel 3 miles upstream, the time spent travelling upstream is

3/(35 - x)

Since the time is the same, then

7/(35 + x) = 3/(35 - x)

Cross multiplying, it becomes

7(35 - x) = 3(35 + x)

245 - 7x = 105 + 3x

3x + 7x = 245 - 105

10x = 140

x = 140/10

x = 14

6 0

3 years ago

I cant figure this out

aksik [14]

Answer:

Step-by-step explanation:

660

4 0

4 years ago

To get to work, you drive for 20 minutes at 30 mph, and walk 10 more minutes at 3 mph. What was your average speed?

fiasKO [112]

<span>Note D = r(t)
20min = 1/3 hr and 10min = 1/6 hr

(1/3hr)30mph + (1/6hr)3mph = 10.5 mi, the total distance traveled.

total distance / total time = average speed = 10.5/(1/3 + 1/6) = 10.5/(2/6 + 1/6)
10.5mi/.5hr = 21mph

Hope This Helps </span>

3 0

4 years ago