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2 years ago

. The regular price of a scooter is $89.99. The scooter is on sale for 20%

Mathematics

1 answer:

Artyom0805 [142]2 years ago

3 0

Answer:

Step-by-step explanation:

You might be interested in

Austin earns $9.75 an hour at a part-time job, and earns $12 each time mowing lawns in the neighborhood. They graph the amount o

kaheart [24]

Answer:

$7.25 at part-time job

$9.00 every time lawn mowed

so he would get 33.33 day so we will just say 33 times to get 300 dollars if he gets $9 for mowing. And 41.37 hours to get $300 and he would have to use x and y graph to find the boundary line.

Step-by-step explanation:

4 0

2 years ago

Roy is twice as old as Joan, and in 3 years the sum of their ages will be 21 years. Find their present ages.

Lisa [10]

Answer:

Roy is 10 years old at present and Joan is 5 years old at present

Step-by-step explanation:

Let

x----> Roy's age

y----> Joan's age

we know that

x=2y ----> equation A

(x+3)+(y+3)=21 ----> equation B

substitute equation A in equation B

(2y+3)+(y+3)=21

solve for y

3y+6=21

3y=21-6

3y=15

y=5 years

Find the value of x

x=2y ----> x=2(5)=10 years

therefore

Roy is 10 years old at present

Joan is 5 years old at present

8 0

3 years ago

Suppose a researcher is interested in understanding the variation in the price of store brand milk. A random sample of 36 grocer

liberstina [14]

Answer: ($3.055, $3.205)

Step-by-step explanation:

Given : Significance level : $\alpha: 1-0.95=0.5$

Critical value : $z_{\alpha/2}=1.96$

Sample size : n= 36

Sample mean : $\overline{x}=\$\ 3.13$

Standard deviation : $\sigma= \$\ 0.23$

The confidence interval for population mean is given by :_

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

$\text{i.e. }\$\ 3.13\pm (1.96)\dfrac{0.23}{\sqrt{36}}\\\\\approx\$\ 3.13\pm0.075\\\\=(\$\ 3.13-0.075,\$\ 3.13+0.075)=(\$\ 3.055,\$\ 3.205)$

Hence, the 95% confidence interval to estimate the population mean = ($3.055, $3.205)

3 0

3 years ago

Solve 3x2 + 17x - 6 = 0.

geniusboy [140]

$3x^2 + 17x - 6 = 0\\
3x^2-x+18x-6=0\\
x(3x-1)+6(3x-1)=0\\
(x+6)(3x-1)=0\\
x=-6 \vee x=\dfrac{1}{3}$

7 0

3 years ago

Read 2 more answers

Pablo simplified the expression (2 Superscript negative 4 Baseline) Superscript negative 2 as shown.

Lady_Fox [76]

Answer:

<h3>He should have found 8 as the exponent, not –8.</h3>

Step-by-step explanation:

Given the expression simplified by Pablo as $(2^{-4})^{-2}$

On simplification we have;

According to one of the law of indices $(a^{m})^{n} = a^{mn}$

Applying this law to the question will give;

$(2^{-4})^{-2}\\=2^{-4*-2} \\\= 2^{8}$

Based on the calculation above, the exponent of 2 is 8 which means that Pablo should have found 8 as the exponent, not –8.

7 0

3 years ago