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dusya [7]
3 years ago
14

A hot air balloon is 10 feet off the ground after 2

Mathematics
1 answer:
Rudik [331]3 years ago
8 0

Answer:

9 i think

Step-by-step explanation:

46 - 10 = 36

2 - 6 = 4

36/4 = 9

y= 9x - 17

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You invest $15,000 into two different accounts. One of the accounts has 4% interest and the other has 3.2% interest. After one y
aivan3 [116]

Answer:

(4%) ... $8200

Step-by-step explanation:

x + y = 15000

.04x + .032y = 545.60

y = 15000 - x

.04x + .032(15000 - x) = 545.60

.008x = 65.6

x=8200

6 0
2 years ago
I'm new to this Help please ???
Akimi4 [234]
B involves direct variation. 

y and x are directly proportional.
4 0
2 years ago
Josh has $9.00. Bagels cost $0.70 each and a small container of cream cheese cost $2.50. What is the greatest number of bagels J
deff fn [24]

Answer:

Josh's 9.00

Bagel cost 0.70

Ice cream 2.50

9.00–2.50=6.50

6.50

6.50 \div 0.70 7

=10

7 0
3 years ago
The U.S. Energy Information Administration (US EIA) reported that the average price for a gallon of regular gasoline is $3.94 (U
tekilochka [14]

Answer:

a) 25

b) 49

c) 97

Step-by-step explanation:

The sample size is calculated using the formula, n = (\frac{\sigma\times z}{\textup{Margin of error}})^2

Now,

for 95% confidence level value of z-factor = 1.96

Given:

Mean = $3.94

standard deviation = $0.25

thus,

a) for margin of error = $0.10

n = (\frac{\sigma\times z}{\textup{Margin of error}})^2

or

n = (\frac{0.25\times1.96}{\textup{0.10}})^2

or

n = 4.9²

or

n = 24.01 ≈ 25               (Rounded off to next integer)

b) for margin of error = $0.07

n = (\frac{\sigma\times z}{\textup{Margin of error}})^2

or

n = (\frac{0.25\times1.96}{\textup{0.07}})^2

or

n = 7²

or

n = 49

c) for margin of error = $0.05

n = (\frac{\sigma\times z}{\textup{Margin of error}})^2

or

n = (\frac{0.25\times1.96}{\textup{0.05}})^2

or

n = 9.8²

or

n = 96.04 ≈ 97               (Rounded off to next integer)

6 0
3 years ago
Solve for x:1/20 - 1/4x<1/5-2/5x​
a_sh-v [17]

Step-by-step explanation:

1/20-1/4 ×<1/5-2/5×

<h3>collection of like terms</h3>

1/20+1/5 <-2/5×-1/4×

<h3>= 1/4 <-13/20×</h3>
3 0
2 years ago
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