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2 years ago

A quadratic equation is shown below:

Mathematics

1 answer:

Mariulka [41]2 years ago

7 0

hello :

help :
the discriminat of each quadratic equation : ax²+bx+c=0 ....(a ≠ 0) is :
Δ = b² -4ac
1 ) Δ > 0 the equation has two reals solutions : x = (-b±√Δ)/2a
2 ) Δ = 0 : one solution : x = -b/2a
3 ) Δ < 0 : no reals solutions

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The value of y varies directly with x. If x = 3, then y = 22. What is the value of x when y equals 105

Nutka1998 [239]

Answer:

Varies directly uses the formula: y/x = k

22/3 = 7.33

105/x = 7.33

105/x (7.33/x) = 7.33(x/7.33)

105/7.33 = x

x = 14.32

6 0

2 years ago

(5x+7)(8x+7) = 0 Find the two possible values.

NeTakaya

$(5x + 7)(8x + 7) \\ \\ 5x + 7 = 0 \\ \\ 5x = - 7 \\ \\ x = \frac{ - 7}{5} \\ \\ 8x + 7 = 0 \\ \\ 8x = - 7 \\ \\ x = \frac{ - 7}{8} .$

the values of x are -7/5 and -7/8 .

4 0

1 year ago

Read 2 more answers

QUESTION 94

sattari [20]

Answer: 34.3%

Step-by-step explanation:

$Given:\ 12/35\ flights\ on\ time$

To find the percent, divide then multiply by 100:

$\frac{12}{35} = 0.343\times100=\large\boxed{34.3}$

4 0

1 year ago

Find the sum of 2/3+(-1/3)

leva [86]

2/3+(-1/3)
2/3-1/3
1/3

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3 years ago

What is the equation of the function shown in the graph provided? y= _ x + _

Mkey [24]

Answer:

y = -3x - 6

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Algebra I

Slope Formula: $m=\frac{y_2-y_1}{x_2-x_1}$

Slope-Intercept Form: y = mx + b

m - slope

b - y-intercept

Step-by-step explanation:

Step 1: Define

Find points from graph.

x-intercept (-2, 0)

y-intercept (0, -6)

Step 2: Find slope m

Substitute: $m=\frac{-6-0}{0+2}$
Subtract/Add: $m=\frac{-6}{2}$
Divide: $m=-3$

Step 3: Redefine

Slope m = -3

y-intercept b = -6

Step 4: Write linear equation

Slope-Intercept Form: y = -3x - 6

7 0

2 years ago