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Ymorist [56]
3 years ago
10

A jar of coins contains 8 pennies, 5 nickels, 12 dimes, 7 quarters. you choose a coin at random, do not replace it, and then cho

ose another coin. what is probability of choosing a dime first and quarter second
Mathematics
1 answer:
alina1380 [7]3 years ago
6 0
|\Omega|=32\cdot31=992\\
|A|=12\cdot7=84\\\\
P(A)=\dfrac{84}{992}=\dfrac{21}{248}\approx8.5\%
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Given a quadratic function, y=x2+bx+c what happens to the graph when "a" is positive? A.the parabola opens down, the vertex is t
Llana [10]

Answer:

D

Step-by-step explanation:

The parabola opens up. Which means the vertex is the minimum value.

6 0
3 years ago
Three consecutive whole numbers are such that if they be divided by 5,3 and 4 respectively, the sum of the quotient is 40. What
Alja [10]
\dfrac{x}{5}+\dfrac{x+1}{3}+\dfrac{x+2}{4}=40\\
12x+20(x+1)+15(x+2)=2400\\
12x+20x+20+15x+30=2400\\
47x=2350\\
x=50\\
x+1=51\\
x+2=52

Then umbers are 50,51,52
4 0
3 years ago
Rationalize the denominator in each expression. That is, rewrite the expression so that there is a rational expression in the de
ad-work [718]

Answer:

explanations: we multiply with a rational surd

(x-9)*√(x+9)/(√(x-9)*√(x+9)

=(x-9)√(x+9)/

x {}^{2}   - 9

B.( x-9)/√x+3 =( x-9)*(√x-3)/(√x+3)*(√x-3)

= (x-9)*(√x-3)/x-9

=√x-3

7 0
3 years ago
A paint mixes green and white paint in the ratio 13:50. 4 litres of white paint are used. How much green is used? please help me
wlad13 [49]

Answer:

1.04 liters

Step-by-step explanation:

If 50 is 4liters

Then 13 is x

Use this below equation

Value t is for value y then how much for value z

x =  \frac{t}{y}  \times z

X = 4/50 *13

X = 1.04liters

Or

13/50 = x/4 (cross multiply)

50X = 52

X = 52/50

X = 1.04 liters

6 0
2 years ago
Each month, a local bakery pays $0.75 per square foot to lease 500 square feet of space in a building. The bakery must also pay
ElenaW [278]

Answer:

C=375+0.025d

Step-by-step explanation:

Given:

'C' represent total cost of lease. 'd' represents cost of sales in dollars.

Cost of 1 square foot of building = $0.75

Total area of the building = 500 square feet.

Sales tax on the total sales = 2.5%

Now, cost of 500 square feet area = Cost of 1 square foot × Total area

Cost of 500 square feet area = 0.75\times 500=\$375

Now, sales tax is 2.5 of total sales 'd'. This gives,

Sales tax = 2.5\%\times d=\frac{2.5}{100}d=0.025d

Now, total cost is the sum of least amount and total sales tax.

Total cost = Least amount + Sales tax

⇒ C = 375+0.025d

8 0
3 years ago
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