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Questions in mathematics

[Terjawab] Solve the quadratic equation. [tex]x^2+9 x-15=0[/tex]

[Terjawab] A system of equations is shown. $\left\{\begin{array}{c} y^2+x^2=20 \\ y=-x^2 \end{array}\right.$ Plot the real solutions to the system of equations. Plot each point on the coordinate grid.

[Terjawab] Subtract $(7 x-2)-(3 x-5)$ A. $4 x+7$ B. $4 x-7$ C. $4 x+3$ D. $4 x-3$

[Terjawab] Simplify: $\frac{-15\left(y^2\right)^5}{-5 y^2 y^3}$

[Terjawab] Circular congruent holes with a diameter of 2 in. were punched out of a rectangular piece of paper with dimensions 8.5 in. by 11 in. What is the area of the paper that is left? Use 3.14 for [tex]$\pi$[/tex].

[Terjawab] In a survey, [tex]$\frac{1}{3}$[/tex] of the total players play volleyball only, [tex]$\frac{1}{5}$[/tex] of the total players play football only, [tex]$0130 \frac{3}{5}$[/tex] of total players play football, but 50 play neither of them. Find the number of players who play only one game.

[Terjawab] 1. The answer of an addition sum is called the ______. 2. While writing large numbers, we write them in ______ columns under a ______ chart. 3. The numbers to be added are called ______. 4. The numbers to be subtracted are called ______. 5. The number from which the other number is to be subtracted is called ______. 6. The answer of a subtraction sum is called the ______. 7. The difference of a given number and 0 is the ______ itself. 8. The difference of a given number and 1 is the ______ of the number. 9. When 1 is added to a given number, we get the ______ of the number.

[Terjawab] C. Find the nth term or the general term that describes each of the following sequences. 1. -4, -8, -12, ... 2. 1/2, 1/4, 1/8, ... 3. -2, 1, 7, 16

[Terjawab] Factorise a.) [tex]x^2-18 x+56[/tex]

[Terjawab] Select the correct answer. Write an expression to represent the product of 6 and the square of a number plus 15. In your expression, what is the value of the coefficient? A. 1 B. 15 C. 2 D. 6