SAT Math Section Problem Questions Please!

Test Preparation SAT Preparation
1

<p>I usually get 700s+ very least a 690 but i took a math section and in the college board blue book from like several years ago and i ended up getting a 650 i believe...</p>

<p>I need explanation for the following questions please and how to solve them!</p>

<p>1.) Dwayne has a newspaper route for which eh collects k dollars each day. From this amount he pays out k/3 dollars per day for the cost of the papers, and he saves the rest of the money. In terms of k, how many days will it take Dwayne to save $1000?
a. k/1500, b. k/1000m c. 1000/k, d. 1500/k, e. 1500k</p>

<p>2.) In the xy-coordinate plane, the graph of x = y^2 - 4 intersects line l at (0,p) and (5,t). What is the greatest possible value of the slope of l?</p>

<p>3.) Esther drove to work in the morning at an average speed of 45 miles per hour. She returned home in the evening along the same route and averaged 30 miles per hour. If Esther spent a total of one hour commuting to and from work, how many miles did ESther drive to work in the morning?
a. 80, b. 60, c. 50, d. 15, e. 10</p>

<p>4.) If 30 percent of 40 percent of a positive number is equal to 20 percent of w percent of the same number, what is the value of w?</p>

<p>5.) If (a+b)^1/2 = (a-b)^-1/2, which of the following must be true?
a. b=0, b. a+b=1, c. a-b=1, d. a^2+b^2 = 1, e. a^2-b^2 = 1</p>

<p>There are few more, but those problems have diagrams like graphs and stuff...
I made some stupid errors and sometimes I find myself not knowing wth to do because I would just plain out not know what to do for the problem, even if I learned the types of problems from middle school.</p>

<p>I've been practicing SAT 1 Math by myself for about 2 months or so but I still don't completely know what type of math is on it. Also, I'm taking the SAT 1 in January, but do I have a chance of scoring a 800? or atleast consistent 750s+?</p>

<p>I try to do SAT practice everyday atleast 1 english and 1 math.
And would going over the math chapters etc. study guide in the collegeboard study guide help with sat 1 math? </p>

<p>Thanks,
Dysfunctional</p>

2

<p>

</p>

<p>Write it out as an algebraic expression and for the positive number, use any value you wish such as 12.</p>

<p>Therefore: .3(.4(12))=.2(w(12))
Solve for .60, which equals 60%.</p>

3

<p>thank you so much!
ugh i thought the term ‘of’ meant division… haha my mistake ;/</p>

4

<p>

</p>

<p>Okay on this one you can either use a graphing calculator and trace the points or actually solve it. x=y^2-4 is basically a sideways parabola. It has to intersect at points with line l. Knowing it’s a sideways parabola opening to the right, the larger the values of X, the larger Y becomes. That means that for (0,p), you’ll want a smaller value than (5,t). Plugging in 0 for X in x=y^2-4, you’ll get -2 or 2, but -2 is smaller. Putting in 5 for X, you’ll get 3 or -3, but you want 3 since it’s larger.</p>

<p>Line l and the other equation intersect at points (0,-2) and (5,3), which gives you the slope of 1.</p>

5

<p>Unless I’m missing something number 3 is wrong. The answer should be 18.
Let x be the distance between work and her home.
Time taken = distance / speed.
Time taken to work = x/45.
Time taken from work = x/30. </p>

<p>Total time = 1 hr. So x/45 + x/30 = 1
5x/90=1
X=90/5
X=18.</p>

<p>Number 1:
Let n be the number of days taken to reach $1000.
She earns k dollars per day. And spends k/3 dollars per day. So she saves k-(k/3) = 2k/3 dollars per day.
Money saved in n days = 1000.
n<em>(2k/3)=1000.
n=1000/(2k/3)
n=(3</em>1000)/(2k)
n= 1500/k</p>

6

<p>5.) If (a+b)^1/2 = (a-b)^-1/2, which of the following must be true?
a. b=0, b. a+b=1, c. a-b=1, d. a^2+b^2 = 1, e. a^2-b^2 = 1</p>

<p>Multiply both sides by (a-b)^1/2 and you get [(a+b)(a-b)]^1/2 = (a-b)^0.</p>

<p>Recall that: (any number)^0 = 1, and that (a+b)(a-b) = (a^2 - b^2). Substitute above and square both sides. You get a^2 - b^2 = 1.</p>

7

<p>1.) Dwayne has a newspaper route for which eh collects k dollars each day. From this amount he pays out k/3 dollars per day for the cost of the papers, and he saves the rest of the money. In terms of k, how many days will it take Dwayne to save $1000?
a. k/1500, b. k/1000m c. 1000/k, d. 1500/k, e. 1500k</p>

<p>For most students, I would recommend you do this by picking a number for k. Let’s try k=6. So Dwayne collects 6 dollars each day, and pays out 6/3=2 dollaers each day. Thus he saves $4 each day. 1000/4=250. So it will take Dwayne 250 days to save $1000.</p>

<p>Now substitute k=6 into each answer choice and eliminate any that do not come out to 250. A, B, C, and E come out incorrect. Thus the answer is choice (D).</p>

8

<p>A remark about number 2: many students are uncomfortable knowing when you get a larger or smaller answer. If you want to be cautious, you can simply try all 4 possibilities here, and then take the greatest answer.</p>

9

<p>T is .15 of p. T is r percent of z. What is the order from least to greatest? can somebody help</p>

10

<p>ty so much everyone for the help. and hawkzzter, those multiple choice were suppose to be for the problem below it. thank you and yes the answer is 18 :)</p>

11

<p>@thefran93
Your question is impossible to answer. Maybe you mean p percent instead of r percent.</p>