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2 years ago

9

CAN SOMEONE HELP ME PLEASE ASAP!?

1 answer:

grandymaker [24]2 years ago

4 0

Answer:

1 in : 50 mi

Step-by-step explanation:

You can eliminate the choices that don't make any sense by comparing the given numbers to the offered choices:

given:

15 in : 750 mi

__

A. 1 in : 50 mi . . . . . . . . equivalent to dividing the given ratio numbers by 15

B. 15 in : 100 mi . . . . . . same inches, wrong miles

C. 1 in : 750 mi . . . . . . . wrong inches, same miles

D. 1 mi : 50 in . . . . . . . . both inches and miles are wrong (the ratio has the units swapped)

__

In the given ratio, the numerical number of miles (750) is 50 times the numerical number of inches (15). This is the ratio you're looking for among the answer choices. You need to pay attention to both the numerical values and their associated units.

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irena’s boat traveled 76 miles downstream in 4 hours. on the way back it took her 5 hours and 30 minutes to travel 38.5 miles. i

Oxana [17]

Answer:

The speed of the boat in still water is 13 miles/hour.

The speed of the current is 6 miles/hour.

Step-by-step explanation:

Let the speed of the boat in still water be x

And speed of the current be y

When Irena's travelling downstream, the speed of the boat is:

$Speed=\frac{76 miles}{4 hours}=19 miles/hour$

Traveling down stream the speed of the boat will be :

$x+y=19$ ..(1)

When Irena's travelling upstream, the speed of the boat is:

Time taken by boat = 5 hours and 30 min = 5.5 hours (1 hour = 60 min)

$Speed=\frac{38.5 miles}{5.5 hours hours}=7 miles/hour$

Traveling down stream the peed of the boat will be :

$x-y=7$ ..(2)

On Solving both equation (1)and (2).

$x+y=19$

$x=19-y$ putting value of x in (2) equation

$19-y-y=7$

y = 6 miles/hour

Putting value of y in (1) equation:

$x+6=19$ , x = 13 miles/hour

The speed of the boat in still water is 13 miles/hour.

The speed of the current is 6 miles/hour.

4 0

4 years ago

Read 2 more answers

Find the area of the shaded regions:

Crank

First, we'll find the area of the large section, including the smaller section that is white.

Area of a circle: pi x r^2

A = pi x 7^2

A = 49pi x 120/360

A = 49/3 pi cm^2

Now, we'll find the area of the small section.

A = pi x 3^2

A = 9 pi x 120/360

A = 3pi cm^2

All that's left to do now is subtract.

49/3 pi - 3 pi

40/3 pi cm^2

(or 13 1/3 = 13.33 cm^2)

Hope this helps!

6 0

4 years ago

Perpendicular to y=-3x+11 and goes through the point (-9,-6)<br> please help it’s due next period

mafiozo [28]

Answer:

y = 1/3x - 3

Step-by-step explanation:

If the line is perpendicular to y = -3x + 11, it means that the two gradients multiply to make -1.

So the gradient of the perpendicular line is 1/3 (-3 × 1/3 = -1)

y = 1/3x + c

Next, substitute x = -9, and y = -6 to find the y intercept, or c:

-6 = 1/3(-9) + c

-6 = -3 + c

c = -6 + 3

c = -3

The equation of the line is y = 1/3x - 3

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2 years ago

Solve by factoring x^2 + 8x =9

Helen [10]

Answer:

$x=-9,\:x=1$

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2 years ago

What is the slope of the line connecting the points (2, 1) and (4, 5)?

masha68 [24]

Answer:

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3 0

3 years ago

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