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3 years ago

AHHHHHH HELPPPPPPPPPPPPPP TIMED I’ll give brainliest

Mathematics

1 answer:

Delicious77 [7]3 years ago

3 0

Answer:

D. (2, 6)

General Formulas and Concepts:

Algebra I

Solving systems of equations by graphing

Step-by-step explanation:

The solution set of the systems would be where the 2 lines intersect. We see from the graph that our 2 lines intersect at (2, 6). Therefore, our solution set would be D. (2, 6).

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The height of a triangle is 5 cm shorter than its base. If the area of the triangle is 25 cm2, find the height of the triangle.

Olin [163]

Answer:

$h = 5\ cm$

Step-by-step explanation:

Let's call B at the base of the triangle and call h at the height of the triangle. Then we know that:

The height of a triangle is 5 cm shorter than its base. This means that:

$h = B-5$ .

The area of the triangle is 25 cm²

By definition the area of a triangle is:

$A = 0.5Bh$

For this triangle we know that $A = 25\ cm^2$ and $h = B-5$ . We substitute these values in the equation and solve for B.

$25 = 0.5B (B-5)$

$0.5B ^ 2-\frac{5}{2}B-25 = 0$

Now we use the quadratic formula to solve the equation.

For an equation of the form $ax ^ 2 + bx + c = 0$ the quadratic formula is:

$B=\frac{-b\±\sqrt{b^2-4ac}}{2a}$

In this case note that: $a=0.5,\ \ b=-\frac{5}{2}\ \ c=-25$

Then:

$B=\frac{-(-\frac{5}{2})\±\sqrt{(-\frac{5}{2})^2-4(0.5)(-25)}}{2(0.5)}$

$B=\frac{\frac{5}{2}\±\sqrt{\frac{25}{4}+50}}{1}$

$B=\frac{5}{2}\±\frac{15}{2}$

The solutions are:

$B_1=\frac{5}{2}+\frac{15}{2}=10$

$B_2=\frac{5}{2}-\frac{15}{2}=-5$

For this problem we take the positive solution.

$B=10\ cm$

Now we substitute the value of B in the equation to find the height h

$h = 10-5$

$h = 5\ cm$

6 0

3 years ago

Find the unit price of 16 oz of candy with sells for $4.82

e-lub [12.9K]

The price of 16 oz candy is $4.82.

Determine the unit price of candy.

$\begin{gathered} s=\frac{4.82}{16} \\ =0.30125 \end{gathered}$

4 0

1 year ago

V=u+at u= 2 a= -5 t=1/2 what is the value of v

artcher [175]

At= -5(1/2)
at= -2.5
v= u + at
v= 2 + (-2.5)
v= -0.5

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Find the slope A.-1/7 B.1/7 C.7 D.-7

const2013 [10]

Answer:

Step-by-step explanation:

It just is

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3 years ago

Identify the property of 6 = 6

jekas [21]

Answer:

that is true comunitive property

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