MATHEMATICS HIGH SCHOOL

What is the discriminant of 9x2 + 2 = 10x?
a. -356
b.–172
c.28
d. 72

Answers

Answer 1
Answer: Discriminant is 28 (c) First get the equation into the form: Ax^2 + Bx + C = 0 (the quadratic equation).. By subtracting 10x both sides (to get it on the other side).. 9x^2 + 2 = 10x 9x^2 - 10x + 2 = 10x - 10x 9x^2 - 10x + 2 = 0 Now the discriminant is: b^2 - 4ac The quadratic equation is Ax^2 + Bx + C = 0 Here, A = 9, B = -10 and C = 2 (-10)^2 - 4 (9)(2) = 100 - 4 (18) = 100 - 72 = 28
Answer 2
Answer:

Answer:

What is the discriminant of 9x2 + 2 = 10x?

–356

–172

28

72

answer is 28 c

Step-by-step explanation:

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The sum of a number and 19 is at least 8.2.

Answers

Well the equation for this is = x+19>=8.2
X = a number which is the sum   |    it says and so that's + 19 is at least 8.2 so this means is = to 8.2. Your equation should be set up like this : x+19=8.2.

Evaluate 3{5 + 3[10 + 4 · 8]}

Answers

3 {5 + 3[10 + 4.8]}
3 {5 + 3[ 14.8 ]}
3 {5 + 44.4}
3 {49.4}
148.2
Parentheses first lets do 10 + 4 * 8; Using order of operations, you know we do multiplication before addition so 4*8 = 32, now you can do 32+10 to get 42. Now the equation is 3{5 + 3(42)}, Now remember you do multiplication before addition so you distribute the 3 to the 42 to get 126. The new equation is 3(5+126) Now remember do the parentheses first, 126 + 5 = 131. Now distribute the 3; 3(131) = 393

Answer: 393 :)

1. In a certain county, the number of Charter Schools is eleven less than twice the number of Alternative Schools. There are 35 Charter Schools in the county. Which of the following equations would you use to find the number of Alternative Schools, a, in the county? 


Answers

The first choice ... 2a - 11 = 35 ... will lead you to the number of
Alternative Schools 'a' in the county.

How do i do this ????????????

Answers

Answer:

3.5

Step-by-step explanation:

4x < 14

  • To solve this inequality, we need to isolate x.
  • Since there are no complicated steps to it, we simply need to divide 14 by 4:

14 ÷ 4 = 3.5

So x = 3.5

What is the equation of the line that passes
through the points (3,-1) and (7, 3)?

Answers

Answer: y = 1x + -4

Equation of a straight line:

y = mx + b ------(i)

Step by Step Solution:

Step 1: Calculating Slope (m).

m = y2-y1 /x2-x1

m = 3--1 /7-3

m = 4/4

m = 1

Now putting value of m in equation (i)

y = 1x + b -----(ii)

Step 2: Calculating Y-intercept (b).

Lets choose the first point, (3,-1) for calculating y-intercept:

y = mx + b

-1 = 1(3) + b

-1 = 3 + b

-4 = b

b = -4

Now putting value of b in equation (ii)

y = 1x + -4
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