MATHEMATICS HIGH SCHOOL

2x + 5y = 0
x - 5y = -15

Answers

Answer 1
Answer: 2x + 5y = 0\nx - 5y = -15\n-------\n3x=-15\nx=-5\n\n-5-5y=-15\n-5y=-10\ny=2

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SOLVING SYSTEMS OF EQUATIONS BY SUBSTITUTION.

1. 2x+3y=1
-3x+y=15

Answers

2x+3y=1 \n-3x+y=15 \n \n\hbox{from the 2nd equation:} \n-3x+y=15 \ny=15+3x \n \n\hbox{substitute 15+3x for y in the 1st equation:} \n2x+3(15+3x)=1 \n2x+45+9x=1 \n9x+2x=1-45 \n11x=-44 \nx=-4 \n \n\hbox{solve one of the equations for y}: \n2x+3y=1 \n2 \cdot (-4) + 3y=1 \n-8+3y=1 \n3y=1+8 \n3y=9 \ny=3 \n \n\hbox{the answer:} \nx=-4 \ny=3

1. How can you use an equation to make a prediction from a pattern? 2. Pizza costs $1.50 per slice. Use a table and an equation to represent the relationship between the number of slices of pizza bought and the total cost.

Answers

So for question 1, Well, using an equation to make a prediction for patterns is pretty easy, really. It is also very efficient. When you look at the pattern, you should be able to make an equation based upon the pattern, or any previous patterns, and using that, you can make an equation to solve or figure out other parts of the pattern. 


ANSWER ASAP FOR BRAINLIESTT

Answers

It was really fun 4639

If you buy 10 printers for your office and each printer costs $199, what is your cost for all 10?a. $2,990
b. $1,999
c. $1,990
d. $2,999

Answers

You buy: 10 printers
Each cost: $199
Total cost = ?

199 × 10 = total cost
199 × 10 = 1990
$1,990

This proves that c. $1,990 is your answer.

HELP!!!Find the exact circumference of a circle with the given radius.

36 inches

C =

A) 72π in.

B) 36π in.

C) 18π in.

Answers

Hello!

To find the circumference of a circle, use the formula: C = 2πr. Since the radius is given, we can substitute that into the formula.

C = 2(36)π

C = 72π

Therefore, the circumference of the circle is 72π inches.

Please hurry need it asap

Answers

Answer:

I think its B

Step-by-step explanation:

Answer:

use math w ay .co m its helps

Step-by-step explanation:
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HELP ILL GIVE BRAINLIESTTwenty students in Class A and 20 students in Class B were asked how many hours they took to prepare for an exam. The data sets represent their answers.Class A: {2, 5, 7, 6, 4, 3, 8, 7, 4, 5, 7, 6, 3, 5, 4, 2, 4, 6, 3, 5}Class B: {3, 7, 6, 4, 3, 2, 4, 5, 6, 7, 2, 2, 2, 3, 4, 5, 2, 2, 5, 6}Which statement is true for the data sets?A. The mean study time of students in Class A is less than students in Class B.B. The mean study time of students in Class B is less than students in Class A.C. The median study time of students in Class B is greater than students in Class A.D. The range of study time of students in Class A is less than students in Class B.E. The mean and median study time of students in Class A and Class B is equal.