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deff fn [24]
4 years ago
11

Every Day when Lisa returns from school, she puts her change from buying lunch into a jar on her dresser. This weekend she decid

ed to count her savings.
She found that she had 72 coins, all nickels and dimes. The total amount was $4.95. How many coins of each type did she have?

1. Brainstorm ways you may be able to solve this problem. List and describe at least two different ways you come up with.
Mathematics
1 answer:
Hunter-Best [27]4 years ago
7 0
Do you own work!

- Mrs. C.
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Max's house has two steps on
Drupady [299]

Given:

Max's house has two steps on  the front porch.

Size of each step is the same.

To find:

The total vertical distance covered by  the two steps.

Solution:

From the given figure, it is clear that,

Base length of each step = 6 in

Hypotenuse = 10 in

Let h be the vertical height of each step.

Using Pythagoras theorem, the vertical height of one step is

Base^2+Perpendicular^2=Hypotheuse^2

6^2+h^2=10^2

36+h^2=100

h^2=100-36

h^2=64

Taking square root on both sides.

h=\pm\sqrt{64}

h=\pm 8

Height cannot be negative. So, h = 8 in.

Now,

Vertical height of 2 steps = 2\times 8

                                         = 16

So, the total vertical distance covered by  the two steps is 16 in.

Therefore, the correct option is A.

7 0
3 years ago
Not sure about the answers I gave <br><br> Need help with the others
aleksandrvk [35]

Answer:

Ask me

Step-by-step explanation:

Tell me dear ask..

4 0
3 years ago
Evaluate the expression, below, when a = 2 and b = 5. <br><br> (3 + a)² • (4 – b) + √36
stellarik [79]

Answer:

-19

Step-by-step explanation:

1) substitute a with 2 and b with 5

(3 + 2)^2 * (4-5) + √36

2) solve the brackets and the square root

(5^2) * (-1) + 6

3) solve the power

25 *(-1) + 6

4) solve the multiplication

-25 + 6

5) solve the sum

- 19

6 0
3 years ago
Emily's parents put $1,500 in her bank account for college tuition. At an interest rate of 8.25% compounded semi-annually, what
s2008m [1.1K]

Answer:

Step-by-step explanation:

4 0
3 years ago
The mean life of a television set is 123 months with a standard deviation of 19 months. If a sample of 55 televisions is randoml
sp2606 [1]

Answer:

1- P(-0.47 < z < 0.47) = 0.63836

Step-by-step explanation:

Here, we want to get the answer to;

1-P ( -0.47 < z < 0.47)

Mathematically, we are going to use the standard normal distribution table for this

Let us try to evaluate;

P(-0.47 < z < 0.47)

Mathematically, that will be;

P (z < 0.47) - P(z < -0.47)

where P (z < -0.47) = P( z > 0.47)

so we have

P(-0.47 < z < 0.47) = P(z < 0.47) - P(z > 0.47)

So we have this using the standard normal distribution table as follows;

0.68082 - 0.31818 = 0.36164

Now, we can insert this in the earlier expression of;

1- P(-0.47 < z < 0.47)

= 1-0.36164 = 0.63836

4 0
3 years ago
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