All categories

2 years ago

Help pleaseeeeeeeee :)

Mathematics

2 answers:

Alchen [17]2 years ago

7 0

$\Large\leadsto \sf \frac{1}{2} (x \: + \: 9) \: = \: 3$

$\Large\leadsto\sf\frac{1}{2} x \: + \: \frac{9}{2} \: = \: 3$

$\Large\leadsto\sf \frac{2x \: +\: 18}{4} \: = \: 3$

$\large \leadsto\sf 2x \: + \: 18 \: = \: 3 \: \times \: 4$

$\large\leadsto\sf2x + \: 18 \: = \: 12$

$\large\leadsto\sf2x \: = 12 \: - \: 18$

$\large\leadsto \sf 2x \: = \: - 6$

$\Large\leadsto\sf \: x \: = \: \cancel\frac { - 6}{2}$

$\large\leadsto\sf \pmb{ \: x \: = \: - 3}$

nexus9112 [7]2 years ago

5 0

Answer:

x=-3

Step-by-step explanation:

x+9 = 3.2=6

x= 6-9=-3

You might be interested in

(xy)^2 <----this is the promblem......<br><br> WHAT IS THIS IN WORD FORM?

Gnom [1K]

Wouldnt this be something like x and y squared

5 0

2 years ago

A body moves s metres in a time t seconds so that s = t3 – 3t2 + 8. Find:

Lady bird [3.3K]

Using derivatives, it is found that:

i) $v(t) = 3t^2 - 6t$

ii) 9 m/s.

iii) $a(t) = 6t - 6$

iv) 6 m/s².

v) 1 second.

<h3>What is the role of derivatives in the relation between acceleration, velocity and position?</h3>

The velocity is the derivative of the position.

The acceleration is the derivative of the velocity.

In this problem, the position is:

$s(t) = t^3 - 3t^2 + 8$

item i:

Velocity is the <u>derivative of the position</u>, hence:

$v(t) = 3t^2 - 6t$

Item ii:

$v(3) = 3(3)^2 - 6(3) = 27 - 18 = 9$

The speed is of 9 m/s.

Item iii:

Derivative of the velocity, hence:

$a(t) = 6t - 6$

Item iv:

$a(2) = 6(2) - 6 = 6$

The acceleration is of 6 m/s².

Item v:

t for which a(t) = 0, hence:

$6t - 6 = 0$

$6t = 6$

$t = \frac{6}{6}$

$t = 1$

Hence 1 second.

You can learn more about derivatives at brainly.com/question/14800626

7 0

1 year ago

A circle has An area of 36 pi square inches which best represents the circumference of the circle.

kkurt [141]

Answer: 12πins.

Step-by-step explanation:

Since the area if a circle = πr²

From the question

Area of the circle = 36πins²

To find the circumference of the circle, we need to find the common radius of the circle and this could be achieved from the area of the circle given above.

πr² = 36π, solving this gives. Divide through by π

r² = 36

r = +/-√36

= +/-6

Now to find the circumference of the circle, we substitute for r in the formula below.

Circumstances = 2πr

= 2 ×π × 6

= 12πins.

4 0

2 years ago

What is the benchmark fraction of 7/10 x 16

Tomtit [17]

Lets change "16" by its to 16/1 .. since nothing can't help support 16 by itself when it is going into 7/10

Now that we change that ... your problem becomes 7/10 × 16/1

7/10 × 16/1 = 11 1/5

Because
7(16) / 10(1) = 112/10
Now lets go. to how we solve the for the answer

112/10 = 11 1/5

☺

6 0

2 years ago

A line has a slope of 10 and includes the points (3, n) and (4,0). What is the value of n?<br> n =

ExtremeBDS [4]

Answer:

The value of n = -10

Step-by-step explanation:

Given the points

(3, n)

(4,0)

Finding the slope between (3, n) and (4,0)

$\left(x_1,\:y_1\right)=\left(3,\:n\right),\:\left(x_2,\:y_2\right)=\left(4,\:0\right)$

As slope = 10

using the formula

Slope = [y₂ - y₁] / [x₂ - x₁]

so substituting the values

10 = [0 - n] / [4 - 3]

10 = -n / 1

10 = -n

n = -10

Therefore, the value of n = -10

8 0

2 years ago