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4 years ago

Do anybody know this answer because I need help

Mathematics

1 answer:

Papessa [141]4 years ago

8 0

Answer:

x=-7

Step-by-step explanation:

divide 12 on both sides and that equals -7

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4 ways to simplify 4(5+6)

Lyrx [107]

Answer:

see explanation.

Step-by-step explanation:

1. Solve 5+6

Simplify:

4*11.

2. A different equation.

Simplify:

(4*5)+6

this is all I can think of.

hope this helps.

8 0

3 years ago

PLEASE HELP ASAP!!!!!!!!

steposvetlana [31]

Answer:

4.6.

Step-by-step explanation:

The rocket hits the ground when h(t) = 0. So

$-16t^{2} + 72t + 7 = 0$

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}$

$\bigtriangleup = b^{2} - 4ac$

In this question:

$-16t^{2} + 72t + 7 = 0$

$a = -16, b = 72, c = 7$

Then

$\bigtriangleup = 72^{2} - 4*(-16)*7 = 5632$

$t_{1} = \frac{-72 + \sqrt{5632}}{2*(-16)} = -0.1$

$t_{2} = \frac{-72 - \sqrt{5632}}{2*(-16)} = 4.6$

Time is a positive measure, so the answer is 4.6.

6 0

3 years ago

Amy and Roger both wash windows at a large downtown building. Any can wash 25 windows in 4 hours. Roger can was 32 windows in 6

Radda [10]

Amy can wash 6.25 windows per hours

rodger can wash 5.3 windows per hour

multiply those numbers by 12 and add them

138.6 windows

7 0

4 years ago

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What is the area for this question?

kykrilka [37]

Height of the figure is 12 ft.

Solution:

In this image parallel sides and area are given but height is not given.

We have to find the height of the figure.

Given image is a trapezoid.

Parallel sides = 4.2 ft and 9 ft

Area = 79.2 ft²

Area of the trapezoid = $\frac{1}{2}\times \text{Sum of the parallel sides} \times \text{height}$

$$79.2=\frac{1}{2}\times {(4.2 + 9)}\times {h}$

$$79.2=\frac{1}{2}\times 13.2\times {h}$

79.2 = 6.6 × h

Divide by 6.6 on both sides, we get

12 = h

Switch the sides of the equation.

h = 12

Height of the figure is 12 ft.

7 0

4 years ago

Help me solve this.50+(3x+4)

torisob [31]

Answer:

50+4=54 and you can't add a number with a letter to th number that doesn't so it is 54+3x.

Step-by-step explanation:

4 0

3 years ago

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