3 years ago

How do I solve number 1

1 answer:

3 0

Because he ended up paying $24 more than the actual price of the drill, this is the amount of interest he paid.

In total, the repairman pays $324 in 6 equal payments. So, each payment was $\dfrac{\$324}6=\$54$ .

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Rachael got a 550 on the analytical portion of the Graduate Record Exam (GRE). GRE scores are normally distributed and have mean

yawa3891 [41]

Answer:

0.0475

Step-by-step explanation:

Given that :

Area To the left :

P(Z < 550) = 0.0475 ; that is proportion who scored better than of 550 has a Zscore of 0.0475.

Hence, percentage of students who scored better than she did will be 0.0475

6 0

3 years ago

Please help me with this I don't really understand it

tino4ka555 [31]

Answer:

Step-by-step explanation:

-39

6 0

3 years ago

(x 4 - 81) (x - 3) . write answers in descending power of x. (division)

Zinaida [17]

Answer:

x^3+3x^2+9x+27

Step-by-step explanation:

$\dfrac{x^4-81}{x-3}=\dfrac{(x^2-9)(x^2+9)}{x-3}=\dfrac{(x-3)(x+3)(x^2+9)}{(x-3)}\\\\=(x+3)(x^2+9)=x^3+3x^2+9x+27$

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The factoring of the difference of squares is used (twice):

a² -b² = (a -b)(a +b)

4 0

3 years ago

A certain drug is made from only two ingredients: compound A and compound B. There are 3 milliliters of compound A used for ever

Sphinxa [80]

Answer:

$304\dfrac{4}{7}\ milliliters$

Step-by-step explanation:

If there are 3 milliliters of compound A used for every 4 milliliters of compound B, then we can denote that we use 3x milliliters of compound A and 4x milliliters of compound B to get 533 milliliters of the drug. Thus,

$3x+4x=533,\\ \\7x=533,\\ \\x=\dfrac{533}{7}\ milliliters.$