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Tatiana [17]
2 years ago
7

Box A contains only 20-cent coins and Box B contains only 50-cent coins. The number of coins in Box A is twice the number of coi

ns in Box B. The amount of money in Box B is $1.60 more than the amount of money in Box A. How many 20-cent coins are there in Box A?​
Mathematics
1 answer:
Sveta_85 [38]2 years ago
3 0

Answer: There should be 16, 20 cent coins

Step-by-step explanation:

First we have to do 1.60 x 2 which equals 3.2

Then we divided by 0.20 because the equals the 20 cent coins

We get 16

We can check our work by 0.20 x 16 and that gives us 3.2

I hope this helps!

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A plane flies 1.4 hours at 150 mph on a bearing of 10. It then turns and flies hours at the same speed on a bearing of . How far
Gnesinka [82]

Answer:

The answer is "1035.76 miles"

Explanation:

The aircraft flies at 120 mph for 1.5 hours at a 10^{\circ} bearing, then flies at the very same speed at 100^{\circ} bearings for 8.5 hours.

However an angle of 100-10 = 90^{\circ} between displacements

First shifts= 1.5 \times 120 = 180\  miles.

Second shift = 8.5\times 120 = 1020\ miles.

These two shifts are at 90^{\circ} and therefore the final shift is:

\to \sqrt{180^2+1020^2}=1035.76 \ miles

4 0
3 years ago
2 4/10?<br> round to nearest whole number
Wewaii [24]

Answer: 2

2.5 and up we round up

2.4 and lower we round down

8 0
3 years ago
Read 2 more answers
What's the equation of the line that's a perpendicular bisector of the segment connecting C (6, –12) and D (10, –8)? ANSWERS: A)
zavuch27 [327]

Answer:

B) y = x + 2

Step-by-step explanation:

Coordinates of point C =(x_1,y_1)=(6,-12)

Coordinates of point D=(x_2,y_2)=(10,-8)

To find the equation of segment CD

Formula : y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)

Substitute the values in the formula :

y-12=\frac{-8+12}{10-6}(x-6)

y-12=x-6

y=x+6

When two lines are perpendicular to each other the product of their slopes is -1

Let the slope of perpendicular line be x

So, -1 \times x = -1

So, x =1

General equation : y = mx+c

So, Option B has slope = 1

So,the equation of the line that's a perpendicular bisector of the segment connecting C (6, –12) and D (10, –8) is  y = x + 2

5 0
3 years ago
Find the height of the lamppost to the nearest inch.
diamong [38]
<h3>The height of lamp post to nearest inch is 110 inches</h3>

<em><u>Solution:</u></em>

We have to find the height of lamppost

From the figure in question,

Given is a right angled triangle

Where,

base = 40 inches

height = ?

By definition of tan,

tan\ 70 = \frac{opposite}{base}\\\\tan\ 70 = \frac{height}{40}\\\\height = tan\ 70 \times 40\\\\height = 2.7474 \times 40\\\\height = 109.89 \approx 110

Thus height of lamp post to nearest inch is 110 inches

7 0
4 years ago
Which equation matches this graph is y if Y is a gallons of water are used in X in minutes​?
Lesechka [4]

Answer:

option 4

Step-by-step explanation:

Take any point on the graph different from (0, 0). For example, (2, 10) and se which function verifies:

y = 10x ----> 10 = 10*2 = 20 so NOT

y = 1/5x ----> 10 = (1/5)*2 = 2/5 so NOT

y = 2x ----> 10 = 2*2 = 4 ----> so NOT

y = 5x ----> 10 = 2*5 = 10 -----> YES!!

So, f(x) = 5x verifies and matches the graph

6 0
4 years ago
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