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Amiraneli [1.4K]
4 years ago
6

Explain how you know wether an estimate of a product is an overstimate or an underestimate

Mathematics
1 answer:
White raven [17]4 years ago
5 0
Estimation is the process of making quick mental calculation of a value, quantity, or number. 

We basically do estimation every day of our lives.
For example, we want to order several pizzas. We know that each pizza costs between $5 to $10. We order 3 pizza pies; Pie 1 = $6; Pie 2 = $8; Pie 3 = $9.

In getting an estimate, we either overestimate or underestimate. We know that whether a product of an estimate is overestimated or underestimated by the direction of the rounded up numbers.

We overestimate, when we round up the numbers
We underestimate, when we round down the numbers.

Overestimate: $10 x 3 pizza = $30 total cost
Underestimate: $5 x 3 pizza = $15 total cost

Actual cost: $6 + $8 + $9 = $23

In estimating expenses, it is better to overestimate. This gives us an allowance when incidental expenses incur.

In estimating income, it is better to underestimate. It gives us a more realistic value of the income.
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The number of women elected to the us house of representatives has increased nearly every congress since 1985 in ths 99th Congre
PIT_PIT [208]

Answer:

y = 2 · 3 x + 22

Step-by-step explanation:

Analysis: Number of female representatives in 1985 = 22

This can be represented by the point (0,22).

Number of representatives in 2005 = 68.

This can be represented by the point (2205-1985,68)

= (20,68)

Slope of the line : \frac{68-22}{20-0} =\frac{46}{20} =\frac{23}{10} = 2 · 3

∴ Equation of the line :  y = mx + c

⇒ 22 = 2 · 3 (0) + c

⇒ C = 22

∴  y = 2 · 3 x + 22

8 0
3 years ago
How is 3*7 and 6*7 related
coldgirl [10]

Answer:

3*7=21

6*7=42

so 3*7 is 1/2 of 6*7

Step-by-step explanation:

6 0
3 years ago
Write an equation of a line parallel to y = -2x + 3 that passes through (-2,-1)
ElenaW [278]

\boxed{y=-2x-5}

<h2>Explanation:</h2>

The slope-intercept form of the equation of a line:

y=mx+b \\ \\ \\ Where: \\ \\ m:Slope \\ \\ b:y-intercept

The given line has the following characteristics:

y=-2x+3 \\ \\ \\ So: \\ \\ m=-3 \\ \\ b=3

So the line we are looking for needs to be:

y=-2x+b \\ \\ \\ It \ passes \ through \ (-2,-1): \\ \\ -1=-2(-2)+b \\ \\ b=-1-4 \\ \\ b=-5

So, the equation of the line would be:

\boxed{y=-2x+3}

<h2>Learn more:</h2>

Many-to-one function: brainly.com/question/12881881

#LearnWithBrainly

3 0
4 years ago
Sense or nonsense Peter and Jade are using what they know about properties to write an expression equivalent to 2×(n+6)+3 whose
Lisa [10]

Answer:

Jade's work makes sense, Peter's does not.

Step-by-step explanation:

What's wrong with Peter's work:

Peter did not apply associative property correctly. You cannot change what is inside the parenthesis. He also shouldn't be using associative property to solve this equation because it just doesn't make sense!

Jade's work:

She applied distributive property correctly and multiplied each term in the parenthesis by 2. All of her processes are logical and make sense! I could go on, but everything is correct lol

Best of wishes mate!

5 0
3 years ago
Read 2 more answers
Mr. Smith is flying his single-engine plane at an altitude of 2400 feet. He sees a cornfield at an angle of depression of 30º. W
Svet_ta [14]

Answer:

Height of the fighter plane =1.5km=1500 m

Speed of the fighter plane, v=720km/h=200 m/s

Let be the angle with the vertical so that the shell hits the plane. The situation is shown in the given figure.

Muzzle velocity of the gun, u=600 m/s

Time taken by the shell to hit the plane =t

Horizontal distance travelled by the shell =u

x

t

Distance travelled by the plane =vt

The shell hits the plane. Hence, these two distances must be equal.

u

x

t=vt

u Sin θ=v

Sin θ=v/u

=200/600=1/3=0.33

θ=Sin

−1

(0.33)=19.50

In order to avoid being hit by the shell, the pilot must fly the plane at an altitude (H) higher than the maximum height achieved by the shell for any angle of launch.

H

max

=u

2

sin

2

(90−θ)/2g=600

2

/(2×10)=16km

4 0
3 years ago
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