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maksim [4K]
3 years ago
6

15% markdown, 24.30 regular price, sale price?

Mathematics
1 answer:
viktelen [127]3 years ago
3 0

Answer:

20.65

Step-by-step explanation:

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Evaluate the expression. 4×6 – 21 ÷3​
Norma-Jean [14]

Answer: 17

Step-by-step explanation: 4x6= 24. then 21 divided by 3= 7. 24-7= 17

3 0
3 years ago
Read 2 more answers
Find the approximate volume. Round to the hundredth when necessary.
Alika [10]

Answer:

Step-by-step explanation:

1: Base Surface Area =  π×72

=  153.9380400259 millimeters2

Lateral Surface Area =  π×7×√72 + 142

=  344.215921821 millimeters2

Total Surface Area = 498.1539618469 millimeters2

Rounded = 500 millimeters2

2:Base Surface Area =  π×52

=  78.539816339745 centimeters2

Lateral Surface Area =  π×5×√52 + 102

=  175.62036827602 centimeters2

Total Surface Area = 254.16018461576 centimeters2

Rounded 300 centimeters2

6 0
3 years ago
A group of transfer bound students wondered if they will spend the same mean amount on texts and supplies each year at their fou
Jet001 [13]

Answer:

We accept H₀. We don´t have enough evidence to support the difference between the two means

Step-by-step explanation:

Group 1 : Comunity College

Sample:

size  :   n₁  = 54

Sample mean    x₁  = 947

Sample standard deviation     s₁ = 254

Group 2 : Local University

Sample

size  :  n₂  =  66

Sample mean :  x₂  = 1011

Sample standard deviation    s₂  =  87

Significance level  α  = 0,05      α  =  5 %      CI = 95 %

Both samples are with n> 30 so we can use z table for the test

from z-table we find  z(c)  =  1,96

The problem statement establishes to run a hypothesis test to determine if the means are statistically the same  ( or different) then we use two-tail-test

Hypothesis Test

Null Hypothesis                        H₀             x₁   -  x₂  = 0 or    x₁  = x₂

Alternative hypothesis             Hₐ             x₁  -  x₂  ≠  0  or    x₁ ≠ x₂

To calculate

z(s)  =  (  x₁   -  x₂  ) / √ s₁²/n₁  + s₂²/n₂ )

z(s)  =  947  -  1011 / √  (254)²/54   +  (87)² / 66

z(s) = -  64  /√ 1194,74  +  114,68

z(s) =  - 64  / 36,185

z(s) =  - 1,77

Comparing modules of  |z(c)|  and |z(s)|

z(s) < z(c)

Then z(s) is in the acceptance region we accept H₀ . There is not enough evidence to support differences in the means of the two groups

3 0
3 years ago
How to do multiplying radical expressing
8_murik_8 [283]
The answer is
8 \sqrt{6}
. I've demonstrated the 'split and combine' method in the image attached.
This principal is based on the fact that you can multiply and divide radicals as you would with regular integers, but you remember that the answers remain as radicals unless the number you're dealing with is a square (e.g. 9, 16, 25).

6 0
3 years ago
Josh will take 10 tests in five weeks at school how many tests will he have taken after seven weeks
lbvjy [14]
10(the number of tests) divided by 5(the amount of weeks)=2. That is 2 tests every week. 2x7 weeks is 14 tests. Or this could be a trick question and he could have only had tests for 5 weeks.
3 0
3 years ago
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