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oee [108]
3 years ago
8

‼️Problem Solving‼️

Mathematics
2 answers:
sashaice [31]3 years ago
6 0

Answer:

12 hours

Step-by-step explanation:

He earns R150 per hour and he wants to earn R1800:

1800/150 = 12

He must work 12 hours to earn R1800.

enot [183]3 years ago
5 0

Step-by-step explanation:

150/1800

=12

he must work 12 hours to earn rs.1800

mark me as brainliest if this helps to u

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EMERGENCY momoninos operations 1.) 2a-3b divided by 6 2.) 4m+5n divided by 12 3.) 5m-4x divided by -3 4.) 4x+8y-3z divided by 9
faltersainse [42]

Answer:

1) (a/3) - (b/2)

2) (m/3) + (5n/12)

3) (-5m/3) + (4x/3)

4) (4x/9) + (8y/9) - (z/3)

5) (-5a/8) + (-3b/8) + (-3c/2)

Step-by-step explanation:

1) 2a-3b divided by 6

(2a-3b)/6 = (2a/6) - (3b)/6 = (a/3) - (b/2)

2) 4m+5n divided by 12

(4m+5n)/12 = (4m/12) + (5n/12) = (m/3) + (5n/12)

3) 5m-4x divided by -3

(5m-4x)/(-3) = (-5m/3) + (4x/3)

4) 4x+8y-3z divided by 9

(4x+8y-3z)/9 = (4x/9) + (8y/9) - (3z/9) = (4x/9) + (8y/9) - (z/3)

5) 5a+3b+12c divided by -8

(5a+3b+12c)/(-8) = (-5a/8) + (-3b/8) + (-12c/8) = (-5a/8) + (-3b/8) + (-3c/2)

8 0
3 years ago
A researcher is interested in estimating the difference in two population proportions. A sample of 400 from each population resu
sergey [27]

Answer: (-0.086, 0.026)

Step-by-step explanation:

The confidence interval for the difference of two population proportion is given by :-

p_1-p_2\pm\ z_{\alpha/2}\sqrt{\dfrac{p_1(1-p_1)}{n_1}+\dfrac{p_2(1-p_2)}{n_2}}

Given : Significance level : \alpha: 1-0.90=0.10

Critical value : z_{\alpha/2}=1.645

Sample size : n_1=400,\ n_2=400

p_1=0.61,\ p_2=0.64

The 90% confidence interval for the difference in the population proportions will be :-

0.61-0.64\pm\ (1.645)\sqrt{\dfrac{0.61(1-0.61)}{400}+\dfrac{0.64(1-0.64)}{400}}\\\\\approx-0.03\pm0.056=(-0.03-0.056,-0.03+0.056)\\\\=(-0.086, 0.026)

7 0
3 years ago
In a​ circle, a 135degrees sector has area 54pi in2. What is the radius of the​ circle?
Kobotan [32]

Answer:

567

Step-by-step explanation:

it got it wrong and then it told me the right anser

7 0
3 years ago
Its late ........................
ad-work [718]

4. To simplify the expression, multiply J by 1 + the rate:

The expression would be j(1.05)

New price = 35(1.05) = 36.75

5. multiply the cost of each ( t-shirt and cd) by the number of cds bought:

Total = 12x + 7.50x

Simplify by adding the price of each together:

Total = 19.5x

3 0
3 years ago
Find the difference 3.4-(-1.5)
True [87]

Answer:

=4.9

Step-by-step explanation:

3.4-(-1.5)

+

3.4+1.5=4.9

7 0
4 years ago
Read 2 more answers
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