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3 years ago

The isosceles triangle has a perimeter of 7.5 m.

Mathematics

2 answers:

shepuryov [24]3 years ago

7 0

D) 2.1+2x=7.5

All the sides added together will equal the perimeter

Tema [17]3 years ago

6 0

It's isosceles triangle, so,

X+X+2.1=7.5
so 2.1+2x=7.5

so ANSWER is D !

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The area of the shaded region to the nearest tenth is __________.

goldfiish [28.3K]

Answer: 380 ft^2

Step-by-step explanation:

Length of sides of square=25

Diameter of semicircle=25

Radius=r=25/2=12.5

π=3.14

Area of square=length x length

Area of square=25 x 25=625

Area of semicircle=0.5 x π x r x r

Area of semicircle=0.5 x 3.14 x 12.5 x 12.5

Area of semicircle=245.3125

Area of shaded portion=area of square - area of semicircle

Area of shaded portion=625-245.3125

Area of shaded portion=379.6875

Area of shaded portion=380ft^2

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3 years ago

Two trains leave the station at the same time, one heading east and the other west. The eastbound train travels at a rate of 65

koban [17]

Answer:

time = 1 hour 24 minutes

Step-by-step explanation:

Given that:

Eastbound train travels at a rate of 65 miles per hour

Westbound train travels at a rate of 85 miles per hour

So speed = 65 + 85 = 150 miles per hour

Total distance = 210 miles

We have to find the time

We know that

Distance = time * speed

time = distance / speed

time = 210/150

time = 1.4 hours

Or it can be written as:

time = 1 hour 24 minutes

i hope it will help you!

6 0

4 years ago

ASAP!!!! ITS FOR A THANKS!

olasank [31]

Given:

Alex has 70% of her weekly paycheck automatically deposited into a savings account. This week, $35 is deposited.

We need to determine the equation to find p, the total amount of Alex's paycheck.

Equation for p:

Let us determine the equation for p.

Thus, from the given, we have;

$Total \ weekly \ paycheck = \frac{total \ deposit}{percentage \ to\ be\ deposited}$

Substituting the values, we have;

$p=\frac{35}{70 \%}$

Simplifying, we get;

$70\%=\frac{35}{p}$

$\frac{70}{100}=\frac{35}{p}$

Thus, the equation to determine the total amount of Alex's paycheck is $\frac{35}{p}=\frac{70}{100}$

Hence, Option A is the correct answer.

4 0

4 years ago

Item 14 Find the missing dimension. Use the scale factor 1 : 12.

Vitek1552 [10]

Answer:

3.84m

Step-by-step explanation:

If the scale for this Water tower is 1 : 12 then this means that for every 1cm of the model, the actual water tower has 12cm. Therefore, in order to find the actual depth of the water tower we first need to multiply the depth of the model by 12.

32cm * 12 = 384cm

1 cm is equal to 0.01 m , therefore we now have to multiply the depth of the actual water tower which is in cm by 0.01 to get the actual depth in meters

384 * 0.01 = 3.84m

7 0

3 years ago

Xis normally distributed with mean 1,000 and standard deviation 250. What is the probability that X lies between 800 and 1, 100?

Dominik [7]

Answer:

0.4435

Step-by-step explanation:

Given that :

X is normally distributed:

mean(m) = 1,000

standard deviation (s) = 250

probability that X lies between 800 and 1,100?

Using the relation :

X = 800

Zscore = (x - m) / s

Zscore = (800 - 1000) / 250

Zscore = - 200 / 250

Zscore = - 0.8

P(Z ≤ - 0.8) = 0.2119

X = 1100

Zscore = (x - m) / s

Zscore = (1100 - 1000) / 250

Zscore = 100 / 250

Zscore = 0.4

P(Z ≤ 0.4) = 0.6554

P(Z ≤ 0.4) - P(Z ≤ - 0.8)

0.6554 - 0.2119

= 0.4435

5 0

4 years ago