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2 years ago

PLEASE HELP SHOW WORK

Mathematics

1 answer:

Pachacha [2.7K]2 years ago

4 0

Answer:

1) x = 18, y = -5

2) x= 1, -3 y = 3, -1

Step-by-step explanation:

x+y=13

y = 13-x

2x-y=5

2x-(13-x) = 5

2x - 13 + x = 5

x - 13 = 5

x = 18

x + y = 13

18 + y = 13

y = -5

y = x+2

x^2 + y^2 = 10

x^2 + (x+2)^2 = 10

x^2 + (x+2)(x+2) = 10

x^2 + x^2 + 4x + 4 = 10

2x^2 + 4x + 4 = 10

2x^2 + 4x - 6 = 0

2(x^2 + 2x - 3) = 0

2(x-1)(x+3) = 0

x = 1, x = -3

y = x+2

y = 1 +2 = 3

y = -3+2 = -1

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S=L−rL solve for r Please solve this fast for much points.

podryga [215]

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the expression now becomes,
S−L=−rL
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3 0

3 years ago

Performance Task A. Directions: Solve the problem and answer the following questions. Renz' family attended a pool party. The po

dezoksy [38]

Answer: 144 meters

Step-by-step explanation: area of circle = r^2

6^2 = 36 = 144 Meters given = 4

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8 0

2 years ago

Someone help ASAP!!!!!!

Alchen [17]

Answer:

Length, l = 11 ft.

Width, w = 9 ft.

Step-by-step explanation:

From the given data, the area of the rectangle = 99 ft².

Area of the rectangle = Length, l X Width, w

Here, Length, l = 7 more than twice the width

⇒ Length, l = 7 + 2w

Therefore, Area, A = 99 = (7 + 2w)w

⇒ 99 = 7w + 2w²

⇒ 2w² + 7w - 99 = 0

Solve the Quadratic equation using the formula: x = $\frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$ for the quadratic equation ax² + bx + c = 0.

Therefore, w = $\frac{-7 \pm \sqrt{7^2 -4(2)(-99)}}{2(2)}$

$= \frac{-7 \pm \sqrt{49 + 8(99)}}{4}$

$= \frac{-7 \pm + \sqrt{841}}{4}$

Since, $\sqrt{841} = 29$ we get:

$w = \frac{-7 \pm 29}{4}$

This gives two values of 'w', viz., w = $\frac{-7 - 29}{4}$ , $\frac{-7 + 29}{4}$

$\implies w = \frac{22}{4}, \frac{-36}{4}$

⇒ w = $\frac{22}{4}$ , -9.

We take the integer values.

If w = -9, then l = 2(-9) + 7

⇒ l = - 18 + 7 = - 11

Therefore, the length, l of the rectangle = - 11 ft.

and the width, w of the rectangle = - 9 ft.

Hence, the answer.

3 0

3 years ago

Aubrey is 2 years less than three times Jim's age. If Aubrey is 13 how old is Jim?

34kurt

first you need to mulitply 13 x 3 which is 39, then subtract 2 which is 37.

7 0

2 years ago

Read 2 more answers

Mrs. McDonnell is making 25 paper cones to fill

viktelen [127]

Answer:

(A)29 cubic inch

Step-by-step explanation:

Diameter of the Cone =4 Inches

Height of the Cone =7 Inches

Volume of a Cone $=\frac{1}{3}\pi r^2h$

First, we determine the radius, r.

Radius=Diameter/2=4/2=2 Inches

Therefore:

Volume of one paper cone $=\frac{1}{3}\pi *2^2*7$

=29.32 cubic inch

=29 cubic inch (to the nearest cubic inch.)

5 0

3 years ago