MATHEMATICS HIGH SCHOOL

Solve by substitution
X+3y=1 and -3x-3y=-15

Answers

Answer 1
Answer: x+3y=1\n -3x-3y=-15\n add\quad the\quad equ.\n (x+3y)+(-3x-3y)=1-15\n x-3x+3y-3y=-14\n -2x=-14\n x=\frac { -14 }{ -2 } \n x=7\n Let's\quad rewrite\quad the\quad equ.\n 7+3y=1\n 3y=1-7\n 3y=-6\n y=\frac { -6 }{ 3 } \n y=-2

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Leona tracks her calories burned while boxing. The number of calories she burns is expressed by the function c(t) = 425t, where t is the number of hours spent boxing.To burn more calories, Leona wears heavier gloves while boxing. The number of calories she burns while wearing heavier gloves is expressed by the function b(c) = 1.1c, where c is the number of calories burned while boxing without heavy gloves.

Which of the following composite functions expresses the calories, as a function of time, Leona burns while boxing with heavy gloves?

c[b(t)] = 467.5t
c[b(t)] = 426.1t
b[c(t)] = 467.5t
b[c(t)] = 426.1t

Answers

The function for the number of calories burnt as a function of time is:
c(t) = 425 t

And for the number of calories burnt while boxing with gloves is:
b(c) = 1.1c

Therefore, the composite function that expresses the calories, as a function of time, Leon burns while boxing with heavy gloves is:
b[c(t)] = 1.1 (425 t)
b[c(t)] = 467.5 t

The answer is the third option

Answer:C. I took the test.

Step-by-step explanation:

Triangle inequality Theorem

Answers

states that the sum of any 2 sides of a triangle must be greater than the measure of the third.

Which of the following is the product of (3x − 5) and (3x + 5)?A. 9x2 − 25
B. 9x2 − 30x − 25
C. 9x − 10
D. 9x2 + 25

Answers

Answer:

Step-by-step explanation:

These binomials make up the difference of squares.

3x * 3x = 9x^2

3x * 5 = 15x

-5 * 3x = - 15x

-5 * 5 = - 25

Notice the 2nd and 3rd terms. They are equal except that one is plus and the other minus. That means they cancel. You are left with

9x^2 - 25

the radius and height of a cylinder are in the ratio 5:7.if it's volume is 4400cm cube, find the radius of the cylinder

Answers

V of cylinder= πr2h ...4400= 22/7×5X2×7x. . , x=8 . . . R = 5×8. . R=40

Find the product and write it in lowest terms. 14/51x3/4

Answers


the answer to your question is : 14/51 * 3/4 = 7/34


14*3 = 42

-------------------  = 42/207 (Then you reduce 42/204) and you get 42/204=7/34

51*4 = 204           (Hope this all makes sense :) )

When x = -3 on the graph of y = 2|x| + 3 what will be the y-coordinate?A. -3
B. 3
C. -9
D. 9

Answers

Substitute -3 into the equation

y = 2|x| + 3
y = 2 (3) + 3
y = 6 + 3
y = 9

Answer D
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