Ask for a few SAT math questions, and you will get a high score in a hurry!!! Thank you, thank you

1.For positive integers p, t, x, and y, if p to the power of x = to the power of t to the power of y, and x-y = 3, which of the following is not equal to t?

Solution: First of all, for the positive integer x-y=3, the minimum value of y is 1, then the minimum value of x is 4. Then the x power of p = the y power of t becomes the 4th power of p = t.

And so on, the 5th power of p = the 2nd power of t, the 6th power of p = the 3rd power of t, and if y increases in turn, then x also increases in turn, and can be increased to infinity. No matter how big it is, we find a rule that when x is even, y must be odd, and when x is odd, y must be even. Then, when x is an even number, the equation of p to the x power = t to the y power can be rewritten as the square of p to the xth power = t to the y power, and when x is an odd number, the equation can be rewritten to the x power of p = the square of t to the y power.

This means that regardless of whether x and y are odd or even, one side of the equation can be written as squared. If we calculate that the single digit of any positive integer can only be 1 to 9, then there are always a few numbers in the square of 1 to 9 that will not appear. When the x-power of p is a squared expression, the y-power side of t must also be a squared expression for the equation to be balanced.

So let's take a look at the four answer options, ACDE can be written as a squared expression, except for option B! Then the answer can only be b!

2.When A is divided by 7, the remainder is 4, and when B is divided by 3, the remainder is 2, if 0 - the problem seems incomplete!

The title is incomplete, divided by what number?

It means that 1 k is expressed as a decimal place, the decile is 1, the percentile is 3, and there is at least one digit that is not zero, which means that this number is or is but in any case it must be between the open range, so k-1 k (that is, 1-1 k) must be a few, so choose d.

The second is to say that p is the number of people and v(p) is the expected number of people to vote. But the population itself is growing, as the question says, in 2000 it was 210,000, and in 2015 it was 250,000, that is to say, first use the population in 2000 to bring in the formula, calculate the number of voters in 2000, and then bring the population in 2015 into the formula, and then calculate the number of voters in 2015, and subtract the two to get an increase in the number of voters by 5,000.

1.If you want to calculate d correctly, you have to write (k-1) k, not k-1 k, the two ways of writing are too far apart!!

2.v is a function of p, and you know v(p)=, you take the population p1 = 210,000 in 2000 and the population p2 = 250,000 in 2015 to find the corresponding v1 and v2 respectively, and use v2-v1 to find out how many registered voters have increased, and the calculation is 5000

Hello, I got a full score of 800 on the SAT that year, I hope my answer will help you, did you not understand the first question, which probably means asking which of the following numbers is both singular and prime?

a, d are directly excluded and are even numbers.

Neither c nor e is a prime number (divisible by 3).

So you can only choose B, which is a singular odd integers and a prime number.

The second question is not difficult, the front is basically nonsense to tell you how this graph is generated. Then that line represents how much volume (abscissa) costs (vertical coordinates) on average. And here you ask how much is the volume of 12 ounce, then first find 12 ounce from the abscissa, and then go up to find the y coordinate on the line, which is the most consistent with **.

If you still have questions, you can contact me.

Question 1 Finding a number is both prime and odd, so it's not difficult. Only choose B. Because 5 meets the requirements.

The second question is a univariate linear regression equation, which is the easiest! It is to ask you to find the expression of the straight line y = two points to determine a straight line, you choose the origin and the coordinates 40,5 can be found), the question asks which of the 12 average ** is the closest, that is, when x = 1, you must choose c!! I choose the value closest to that.

But don't correspond to x=12 to find out what y is.

If you have any questions, you can also ask them.

The first question is very strange, I don't understand the meaning, are you sure you copied correctly, it feels like the sentence and logic are wrong.

2) In a set of consecutive numbers, if the first big number is 2, and each number is 3 times more than 2 times the previous number, the fourth number is the number. According to the requirements, the first number is 2, the second number is 3 times more than 2, that is, 2x3+2=8, the same is true for the third number: 8x3+2=26, and the fourth number:

3x26+2=80.

3) If 40404+x=44444, solve the equation x=4040, so 40404-10x=40404-10x4040=4 (see the chapter on numerical substitutions.

4) A positive four-digit integer, its first digit (thousand) is 1, and the single digit is 2 or 5, then how many numbers meet the above conditions. Permutations and combinations, the thousand digits are fixed at 1, the hundred digits and the ten digits each have 10 possibilities (because they can be 0 to 9), and you only have two possibilities, 2 and 5, so there are 10x10x2=200 possibilities.

5) If both q and r are positive, then what percentage of r is q+1? Algebraic content, a is how many percent of b, use a b, so divide r by q+1, which is equal to r q+1, but the question is a percentage, so the result of division should be multiplied by 100 and then added%, so the result is "100 percent q+1" (because the title states that r and q are positive numbers, don't worry about negative results).

6) If a, b are integers, and a+b <1000, a b=, then what is the maximum possible value of b? Algebra a= and b<1000-a, i.e., b<, i.e., <1000, and then use a calculator to find the largest integer of b.

7) How many positive integers within 1000 are multiples of 5 and triple even numbers? Algebra: Multiples of 5 can only end in 0 or 5, and the smallest even number is 2, and its 3 times is 6, so the number that meets the problem must have both 5 and 6 factors, that is, to find the least common multiple of 5 and 6, the result is 30

Then how many of the 1000 are over 30, use 1000 30, round off the digits, and the result is 33.

If w=x+y+z, then how can the average of the four numbers w, x, y, and z be expressed in the algebraic expression of w?

Mean = (w+x+y+z) 4=2w4=w2

If w = x + y + z, then how do you use w to represent the arithmetic mean of x, y, z, and w?

That is, (x+y+z+w) 4, which is equal to 2w 4, so choose a

If w is equal to x+y+z which is the average of w,x,y,z? (denoted by w).

The circumference of a rectangular ground is 250 meters. If one side is 40 meters long, how big is the area? The answer is in square meters.

naomi does silver jewelry. To make a set of earrings, she cut a silver piece from a silver plate, as shown in the picture. Cut out the pieces from the center of the silver dish is 40°. If each uncut silver dish averages grams, how much does each piece of silver weigh?

Your translation upstairs complicates the question...

My Chinese may be a bit awkward, please forgive me, it probably means:

The cost of producing x for a product is c, the relationship between x and c is (that is, the equation in the problem), and k in the equation is a constant (what is x 100?). Typos? If the cost of producing 20 products is 640 yuan, find the constant k=?

i.e. x = 20 and c = 640, find the value of k.