Mini conclusion: if we randomly select a sample of 25 students, there is a 95% probability that the mean score is between 64.08 and 71.92.y-step explanation:

4 0

3 years ago

If 4x-3=7 then 4x=10

Zina [86]

4x=10
Divide ten by four and the answer will be equal to x.

8 0

4 years ago

Please help. explain

riadik2000 [5.3K]

$\bf \begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}$

so the tank tops are 70% off, meaning, 100% - 70% = 30%, the price you pay for one is just 30% of the regular price, if we put that in decimal that'd be (30/100), or just 0.3.

since the price of a tank top is "t", then for 2 is 2t, and the discounted price will just be 30% of "t" so (0.3)2t.

we now the t-shirts are each one 12 bucks discounted already, so for 3 of those will just be (3)(12).

the jeans are half off, namely 50% off, if we put that in decimals, that'd be (50/100) or just 0.5.

we know the regular price of the jeans is "j", so the discounted price will just be (0.5)j, and for just one well, (0.5)(1)j or just 0.5j.

7 0

4 years ago