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4 years ago

Sarah says that 26 divided by 8 equals 14 divided 4 because both are "3 R2. show her mistake using decimal division

Mathematics

1 answer:

mezya [45]4 years ago

8 0

26/8=3.25
14/4=3.5
You must show your work.

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Question 12

WARRIOR [948]

Answer:

Mark's mass is 26 kg.

Step-by-step explanation:

Average mass of Jeremy, Mark and Zack = 28kg

Average mass of Jeremy and Zack = 29 kg

Let,

Jeremy's mass = x

Mark's mass = y

Zack's mass = z

Average of three of them = $\frac{Jeremy's mass + Mark's + Zack's}{3}$

28 = $\frac{x+y+z}{3}\\$

$28*3 = x+y+z\\84 = x+y+z$

x+y+z = 84 Eqn 1

$29 =\frac{x+z}{2}\\58=x+z\\$

x+z = 58 Eqn 2

Now putting value of x+z from Eqn 2 in Eqn 1

x + z + y = 84

58 + y = 84

y = 84 - 58

y = 26

Thereofore,

Mark's mass is 26 kg.

6 0

3 years ago

To understand the conditions necessary for static equilibrium. Look around you, and you see a world at rest. The monitor, desk,

hammer [34]

Answer:

Option A - ∑Fx and ∑τz and ∑Fy

Step-by-step explanation:

All the force will be in x and y plane only

So Torque will be in z plane

These 3 quantities should be 0

∑Fx and ∑τz and ∑Fy

5 0

4 years ago

Which is a true statement? A. -15 > -5 B. -4 > 0 C. -12 < -3 D. 2 < -5

Svet_ta [14]

The true statement is C -12 < -3

6 0

4 years ago

Read 2 more answers

Hello everyone, Agent Mothman here. I hate math, not as much as i hate Zim.. but I still hate it. Please help me out, my dad is

Lana71 [14]

The answer would be A because you would take all of your answers and 1 by 1 multiply it by0.35 and it will give you the answer of $330.43

7 0

4 years ago

Read 2 more answers

Please help :) I have no clue & math isn’t my strong subject.

melisa1 [442]

Equation of a line that is perpendicular to given line is $y=\frac{-7}{4} x+\frac{7}{4}$ .

Equation of a line that is parallel to given line is $y=\frac{4}{7} x-\frac{69}{7}$ .

Solution:

Given line $y=\frac{4}{7} x+4$ .

Slope of this line, $m_1$ = $\frac{4}{7}$

$$\text{Slope of perpendicular line} = \frac{-1}{\text{Slope of the given line} }$

$$m_2=\frac{-1}{m_1}$

$$=\frac{-1}{\frac{4}{7} }$

Slope of perpendicular line, $m_2=\frac{-7}{4}$

Passes through the point (–7, 5). Here $x_1=-7, y_1=5$ .

Point-slope formula:

$y-y_1=m(x-x_1)$

$$y-(-7)=\frac{-7}{4} (x-5)$

$$y+7=\frac{-7}{4} x+\frac{35}{4}$

Subtract 7 from both sides, we get

$$y=\frac{-7}{4} x+\frac{7}{4}$

Equation of a line that is perpendicular to given line is $y=\frac{-7}{4} x+\frac{7}{4}$ .

To find the parallel line:

Slopes of parallel lines are equal.

$m_1=m_3$

$$m_3=\frac{4}{7}$

Passes through the point (–7, 5). Here $x_1=-7, y_1=5$ .

Point-slope formula:

$$y-(-7)=\frac{4}{7} (x-5)$

$$y+7=\frac{4}{7} x-\frac{20}{7}$

Subtract 7 from both sides,

$$y=\frac{4}{7} x-\frac{69}{7}$

Equation of a line that is parallel to given line is $y=\frac{4}{7} x-\frac{69}{7}$ .

7 0

3 years ago