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2 years ago

Find each sum.

Mathematics

2 answers:

Ilya [14]2 years ago

6 0

(3n2-5n+6)+(-8n2-3n-2)
3n2-5n+6-8n2-3n-2
Collect like terms
3n2-8n2-5n-3n+6-2
-5n2-8n+4

yuradex [85]2 years ago

3 0

Answer:

1) C 2) 4, 11, 5

Step-by-step explanation:

Edgenuity, Just got it right

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The Sears tower in Chicago is 1450 feet high. A model of the tower is 24 inches tall. What is the ratio of the height of the mod

miskamm [114]

The ratio of the model's height to actual height of tower is 1:725

Step-by-step explanation:

Given

Actual height of Sears Tower = $H_a$ = 1450 feet

Height of Model = $H_m$ = 24 inches

We can divide the actual height by the model's height to find the scale

Let z be the ratio of the height of the model to the actual height

$z = \frac{H_m}{H_a}\\z = \frac{24\ inches}{1450\ feet}\\z = \frac{12\ inches}{725\ feet}$

The ratio should be in same unit.

We know that

1 ft = 12 inches

Then

$z = \frac{1}{725}\\z=> 1:725$

Hence,

The ratio of the model's height to actual height of tower is 1:725

Keywords: Ratios, models

Learn more about ratios at:

#LearnwithBrainly

6 0

2 years ago

A plot of land has an area of 1,089,000 square feet.The conversion factors between different area measures are shown below.27,87

IgorC [24]

Part A) 24.79 acres

1) Since that plot has an area of

$1,089,000ft^2=1.08\times10^6ft^2$

And the number of units must be between 10 and 10² units.

Part A)

$\begin{gathered} 27,878,400ft^2=2.78784\times10^7ft^2=1m^2 \\ 43560ft^2\text{ =4.356 }\times10^4ft^2\text{ = 1 acre} \end{gathered}$

2) Let's convert them to the apparently plausible units, see if it fits within the given interval.

$\begin{gathered} \frac{1.08\times10^6}{4.356\times10^4}=24.79\text{ acres} \\ \frac{1.08\times10^6}{2.78784\times10^7}=0.03m^{2} \end{gathered}$

We can see that 0.03 m² does not belong to the given interval.

3) Hence, the answer is 24.79 acres.

7 0

1 year ago

HELP PLSS I NEED TO TURN IN RIGHT NOW!!!!

Mumz [18]

Answer: $756

Step-by-step explanation:

convert feet to yards

1 yard = 3 feet

27 ft = 9 yards

18 ft = 6 yards

carpet represents area

area = length x width

area = 9 x 6

area = 54 yards^2

$14 for 54 yards^2 = 14 x 54

14 x 54 = 756

$756

8 0

2 years ago

A fort had enough food for 120 soldiers for 200 days. After 5 days 30 soldiers leave the for . How long will the remaining food

sp2606 [1]

Answer:

Step-by-step explanation:

5 0

2 years ago

What is the value of the expression? -0.75-(-2/5)+0.4+(-3/4)

bearhunter [10]

$-0.75-\left(-\dfrac{2}{5}\right)+0.4+\left(-\dfrac{3}{4}\right)=-0.75+\dfrac{2}{5}+0.4-\dfrac{3}{4}\\\\=-0.75+\dfrac{2\cdot2}{5\cdot2}+0.4-\dfrac{3\cdot25}{4\cdot25}=-0.75+\dfrac{4}{10}+0.4-\dfrac{75}{100}\\\\=-0.75+0.4+0.4-0.75=-(0.75+0.75)+(0.4+0.4)\\\\=-1.5+0.8=-0.7$

8 0

3 years ago