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LekaFEV [45]
3 years ago
7

Which expression represents the value, in dollars, of a certain number of quarters, q, and dimes, d?

Mathematics
2 answers:
Oxana [17]3 years ago
5 0
Quarter and dimes and when you put q+d= meaning its a number
olga_2 [115]3 years ago
3 0
You did not provide any expressions.

0.25q + 0.1d = v

0.25q represents the total value of the quarters
0.1d represents the total value of the dimes
v  total value
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There are red, blue and green counters in a bag in the ratio 2:5:3
antoniya [11.8K]

Answer:

5/10 or 1/2

Step-by-step explanation:

ratio=2:5:3

2+5+3=10 ( total of counters)

10=denominator

blue = ratio 5

5/10

or 1/2 simplified

3 0
3 years ago
A study found that the average stopping distance of a school bus traveling 50 mph was 264 feet. a group of automotive engineers
lutik1710 [3]

Answer:

Step-by-step explanation:

Given that a  study found that the average stopping distance of a school bus traveling 50 mph was 264 feet.

Sample taken showed the following results

n=40\\\bar x =262.3 feet\\Std dev = \sigma= 3 ft

Since population std deviation is known and sample size is large, z test can be used.

H_0: \bar x=264\\H_a: \bar x

(Left tailed test)

Mean difference = 264-262.3 = 1.7

Std error = \frac{\sigma}{\sqrt{n} } \\=\frac{3}{\sqrt{40} } \\=0.474

Z = test statistic = mean diff/std error

= \frac{1.7}{0.474} \\=3.584

p value = 0.00017

Since p < alpha our 0.05 we reject null hypothesis

There is evidence to show that mean is less than 264 feet

(Assumptions:

Sample are randomly drawn

Sample represents the population

4 0
3 years ago
A 0.30 kg bird flies in a horizontal curve of radius 20 m at 15 m/s. The force exerted by the air on the bird is about
monitta

Answer:

<h2>b)  3.48 N approx.</h2>

Step-by-step explanation:

<em>The bird will experience a centripetal force, this is the force exerted on a body that moves through a curve path.</em>

F_c = \frac{mv^2}{r}

Fc=centripetal force

m=mass

v=velocity

r=radius

Step one:

given data

mass of bird m=0.3kg

the radius of curve r= 20m

velocity v= 15 m/s

Substituting we have

F_c = \frac{0.3*15^2}{20}\\\\F_c= \frac{0.3*225}{20}\\\\ F_c=\frac{67.5}{20}\\\\F_c=3.37N

<u>The force is 3.37N</u>

7 0
3 years ago
Find the area of the rhombus. Please need help
Masja [62]

13+13 (because there are two sides of one triangle that both equal 13) then with that answer multiply by 10 (because 10 is the base) and that is the area of one triangle, then multiply the area of one triangle by 2 (because there’s two triangles)

8 0
4 years ago
Need help on the third question. how do i generalise the number of ways to win.(check the attatchment)
almond37 [142]

Answer:

  2n+2 ways to win

Step-by-step explanation:

You generalize by observing patterns in the way you solve the smaller problems.

The number of winning moves is 2n+2: the total of the number of diagonals, columns, and rows.

For an n×n board, there are 2 full-length diagonals, n columns, and n rows, hence 2+n+n = 2n+2 ways to win.

4 0
3 years ago
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