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2 years ago

I need help. trying to solve this.

Mathematics

1 answer:

kkurt [141]2 years ago

8 0

You can use this formula
${x}^{2} + (a + b)x + ab$
a and b are the solutions to the equation

${x}^{2} + ( - \frac{2}{5} + \frac{1}{3} )x + ( - \frac{2}{5} \times \frac{1}{3} ) = 0 \\ {x}^{2} - \frac{1}{15}x - \frac{2}{15} = 0$

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The circle graph shows how the annual budget for a company is divided by the department. If the total annual budget is 15,000,00

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3 years ago

In a young woman's study group, 7 percent of the students are from the town where the young woman's school is located, 80 percen

Umnica [9.8K]

Answer: the percent of study group students from outside the state is 13%

Step-by-step explanation:

The total number of students in the young woman's study group that are from the town where the young woman's school is located is 7%

The total number of students in the young woman's study group that are from in-state (but not from the school's town) is 80%.

Since the rest are from outside the state, the percent of study group students from outside the state would be

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3 years ago

6. What is the value of

e-lub [12.9K]

Answer:

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3 years ago

HELP ASAP ...........

dedylja [7]

Answer:

Step-by-step explanation:

Given

y - 2x - 8 = 0 ( add 2x + 8 to both sides )

y = 2x + 8 → (1)

y² + 8x = 0 → (2)

Substitute y = 2x + 8 into (2)

(2x + 8)² + 8x = 0 ← expand left side using FOIL and simplify

4x² + 32x + 64 + 8x = 0

4x² + 40x + 64 = 0 ( divide through by 4 )

x² + 10x + 16 = 0 ← in standard form

(x + 8)(x + 2) = 0 ← in factored form

x + 8 = 0 ⇒ x = - 8

x + 2 = 0 ⇒ x = - 2

Substitute these values into (1) for corresponding values of y

x = - 8 : y = 2(- 8) + 8 = - 16 + 8 = - 8 ⇒ P (- 8, - 8)

x = - 2 : y = 2(- 2) + 8 = - 4 + 8 = 4 ⇒ Q (- 2, 4 )

Calculate the length of PQ using the distance formula

PQ = $\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2 }$

with (x₁, y₁ ) = P (- 8, - 8) and (x₂, y₂ ) = Q (- 2, 4 )

PQ = $\sqrt{(-2-(-8))^2+(4-(-8))^2}$

= $\sqrt{(-2+8)^2+(4+8)^2}$

= $\sqrt{6^2+12^2}$

= $\sqrt{36+144}$

= $\sqrt{180}$

= $\sqrt{36(5)}$

= $\sqrt{36}$ × $\sqrt{5}$

= 6 $\sqrt{5}$ → A

8 0

2 years ago