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Gre4nikov [31]
3 years ago
12

Please help look at picture. 26 points for helping

Mathematics
1 answer:
Mariana [72]3 years ago
4 0
It's 21 square units. If you map it on a complex plane (x-axis is real numbers, y-axis is imaginary numbers) you'll see that the sides of the rectangle is 3 and 7 which multiply to 21.
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Michael breeds chickens and ducks. Last month, he sold 505050 chickens and 303030 ducks for \$550$550dollar sign, 550. This mont
GenaCL600 [577]
Let the cost of a chicken be x and the cost of a duck, y, then

50x + 30y = 550 . . . (1)
44x + 36y = 532 . . . (2)

(1) x 6 ⇒ 300x + 180y = 3,300 . . . (3)
(2) x 5 ⇒ 220x + 180y = 2,660 . . . (4)

(3) - (4) ⇒ 80x = 640
⇒ x = 640 / 80 = 8

From (1): 50(8) + 30y = 550
⇒ 30y = 550 - 400 = 150
⇒ y = 150 / 30 = 5

Therefore, the price of a chicken is $8 and the price of a duck is $5.
4 0
3 years ago
The 7th grade class experienced a 15% decrease in enrollment. Last year, the 7th grade class had 280 students. How many students
Monica [59]

238 students are enrolled in the 7th grade class this year

<u>Solution:  </u>

Given that

Percentage decrease in number of students enrolled in 7th grade = 15%

Number of students enrolled last year = 280  

Need to determine number of students enrolled in 7th grade this year.

Lets assume number of students enrolled this year = x  

<em>Percentage decrease in enrollment </em>= (Number of student enrolled last year – Number of students enrolled this year) whole divided by number of students enrolled last year multiplied by 100

\begin{array}{l}{\Rightarrow 15=\frac{280-x}{280} \times 100} \\\\ {=>15 \times 280=28000-100 x} \\\\ {=>100 \mathrm{x}=28000-4200=23800} \\\\ {\Rightarrow x=\frac{23800}{100}} \\\\ {\Rightarrow x=238}\end{array}

Hence number of students enrolled this year = 238.

7 0
3 years ago
plz help !! write two real world situations that you can model using the exponential function f(x)=2 to the power of x
Margaret [11]

Answer:

Two real world situations are shown below.

Step-by-step explanation:

Initial population of a certain bacteria is 1 thousand and the population doubles in each hour. So, population of bacteria (in thousands) after x hours is

f(x)=1(2)^x

f(x)=(2)^x

A person invests 1 lakh rupees in shares and the amount is twice at the end of each year. So, total amount (in lakhs) after x years is

f(x)=1(2)^x

f(x)=(2)^x

7 0
3 years ago
Help please! I'll give a brainliest for the best and the correct answer loves!
Fofino [41]
15x10=150
Subtract 5x5=25 small square cut out
150 -25= 125 sq ft
D
3 0
3 years ago
A pipe is at least 21 feet long and you want to cut it into 3 pieces. The second piece is to be twice as long as the first piece
fgiga [73]

Answer:

the minimum length of the first piece is 4 feet

6 0
3 years ago
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