: Một khu đất 20 ha người ta trồng hai loại cây ngô và khoai. Năng suất của ngô tính theo x ha được (5-x/4) tấn trên 1 ha và năng suất của khoai tính theo y ha được (7-y/4) tấn trên 1 ha. Xác định diện tích trồng từng loại cây để sản lượng thu được là lớn nhất.

Answers

Answer 1
Jsksjnsnsjdishdhjskjjkokksns

Related Questions

6=2(y+2) what is the value of y in the equation

Answers

Answer: the value of y is 1

Step-by-step explanation: 6=2 x 1+2

9.
Write the equation of the parabola in vertex form.



A. y = (x – 2)^2 + 4

B. y = x^2 – 4

C. y = (x – 2)^2

D. y = (x – 4)^2 – 4

Answers

Answer:   The Answer Is NOT Letter A

C. y = (x – 2)^2  = Rewrite in vertex form and use this form to find the vertex  ( h , k ) .   ( 2 , 0 )  =Already in vertex form.   y = ( x − 2 ) ^2

Step-by-step explanation:  I used math.way

A. y = (x – 2)^2 + 4  = Rewrite in vertex form and use this form to find the vertex  ( h , k ) .   ( 2 , 4 )  =Already in vertex form.   y = ( x − 2 ) ^2 + 4

B. y = x^2 – 4  = Rewrite in vertex form and use this form to find the vertex  ( h , k ) .   ( 0 , − 4 )  =Find the vertex form.   y = ( x + 0 ) ^2 − 4

C. y = (x – 2)^2  = Rewrite in vertex form and use this form to find the vertex  ( h , k ) .   ( 2 , 0 )  =Already in vertex form.   y = ( x − 2 ) ^2

D. y = (x – 4)^2 – 4  = Rewrite in vertex form and use this form to find the vertex  ( h , k ) .   ( 4 , − 4 )  =Already in vertex form.   y = ( x − 4 ) 2 − 4

What is the slope of the line that has a y-intercept of (0, 6) and passes through the point (2, 8)?

m= ?

Answers

Answer:

m=1

Step-by-step explanation:

[tex]m=\frac{8-6}{2-0} =\frac{2}{2} =1[/tex]

I hope this help you

Use the slope formula AKA rise over run

Y1 - Y2
over
X1 - X2

So for you problem the equation is…

0-2
over
6-8
which equals…

-2/-2 which equals…

1

The slope is 1.

Kylie has lemon and watermelon in a ratio of 10:71. How many watermelon does she have if she has 20 lemons

Answers

Answer:

She will have 142 watermelons

Step-by-step explanation:

First let's put our ratio

10 : 71

Since our lemons are now 20 instead of 10 we will divide 20 by 10 to see how many time we multiplied it by.

[tex]20 \div 10[/tex]

which equals 2

To find our water melon we will multiply it by 2

[tex]71 \times 2[/tex]

which equals 142

She will have 142 watermelons

If (x + 4) is a factor of f(x), which of the following must be true?

Group of answer choices

f(-4) = 0

Neither x = -4 nor x = 4 are roots of f(x).

Both x = -4 and x = 4 are roots of f(x).

f(4) = 0

Answers

f(-4) = 0

Here, we replace x with -4. In doing so, we see that (-4+4) is indeed 0, making this the correct answer.

The next two choices are incorrect since only -4 is a root of f(x), as explained above (a root occurs when the function equals zero when plugging in that “root”).

The last answer is incorrect since plugging in 4 will get f(4)=8.

Write the letter of the arrow that matches each probability word.
a)
*certain' is shown by the letter
b)
'evens' is shown by the letter
C)
'impossible' is shown by the letter

Answers

[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]

A. " Certain " is shown by letter E

B. " Even " is shown by letter C

C. " Impossible " is shown by letter A

Unit #2 - Lesson #13 Exit Ticket: A tour company for large groups charges a one time fee of $200 plus an
additional $25 per person who goes on the tour. They must make at least $1,650 to make the tour profitable. Let
n be the number of people going on the tour. Write and solve an inequality in terms of n that represents all numbers
of people who can go on the tour to make it profitable.

Answers

Answer:

200+25n>1650

Step-by-step explanation:

200 is the one time fee

25n for $25 per person

> because they must make more than 1650 to be profitable

(PHOTO) Please help need this done by tomorrow thank you.​

Answers

Answer:

x = 8

Step-by-step explanation:

These are corresponding angles, and they are equal to one another.

[tex]7x+3=3x+35\\4x+3=35\\4x=32\\x=8[/tex]

If 14 out of 20 students in a college classroom are make, what percentage of the class is composed of men?

Answers

Answer:

70% of the class is composed of men.

Step-by-step explanation:

14: 20*100 =

(14*100): 20 =

1400: 20 = 70

PLS HELP ME PLS HELP ME PLS HELP ME

Answers

Answer:

Step-by-step explanation:

Can someone help me with this problem 9(n+3)<10(n+1)

Answers

[tex]9(n+3)~<~10(n+1)\implies 9n+27~<~10n+10 \\\\\\ 27~<~n+10 \implies 17 ~<~ n[/tex]

In a school of 1,000 students, 600 study physics, 300 study Calculus, and 100 study both. What is the probability that someone who does not study calculus studies physics? Give your answer as a decimal to one decimal place.

Answers

The probability that someone who does not study calculus studies physics is 0.5

Since there are 1000 students in the school and 600 study physics, 300 study Calculus, and 100 study both, we need to find the number of students that study only physics to find the probability that someone who does not study calculus studies physics.

Let x = number of students who study both = 100, y = number of students who studies only physics and z = number of students who studies only calculus.

Given that the number of students who study physics are 600, we have

x + y = 600  (1)

Also, given that the number of students who study calculus are 300, we have

x + z = 300  (2)

From (1)

y = 600 - x

y = 600 - 100

y = 500

So, the probability of students that study only physics = probability that someone who does not study calculus studies physics  is

P(physics) = number of students studying only physics/total number of students

= 500/1000

= 5/10

= 0.5

So, probability that someone who does not study calculus studies physics is 0.5

Learn more about probability here:

https://brainly.com/question/19916581

PLEASE HELP I will mark you BRAINLIST

Answers

Answer:

Angle B: 180-135=45° - supplementary angle rule

Angle C: 180-45-70=65° - sum of interior angles of triangle is 180

Angle D= Angle B : 45° - Alternate interior angles

Angel E=Angle A: 70° - Alternate interior angle.

Angle F: 180-Angle E(70) = 110° - supplementary angle rule

Step-by-step explanation:

what is the inverse of f(x) = x2 − 36

Answers

I think it’s x-2 + 36

plsss answer questions guys


just answer number 5. plsss​

Answers

Answer:

B.{c}

Step-by-step explanation:

Answer:

Hey mate.....

Step-by-step explanation:

This is ur answer.....

B. c

Hope it helps!

Brainliest pls!

Follow me! :)

Juan has x quarters and y dimes, having a minimum of 16 coins worth at
y
most $3 combined. No less than 4 of the coins are quarters. Solve this system
of inequalities graphically and determine one possible solution.

Answers

It is a total amount of more then 10

Maria spends 9/10 hour on her art project. Juan spends 2/6 hour on his art project. Which answer is the most accurate estimate for how much more time Maria spends on her art project than Juan spends on his?

A. 0 hrs
B. 1/2 hrs
C. 3/4 hrs
D. 1 hr

Answers

Answer:

B. 1/2 hrs

Step-by-step explanation:

make the denominator the same

27/30         10/30

27-10= 13

13/30

a half is 15/30 and it's the closest answer since the question said estimate.

if in a game of glass stepping stones. there are 18 tiles of glass. two in each row. one is tempered and will be fine if you jump on it. and the other will break. if 1 player was to play what are his/her chances of getting across?
(NO links)​

Answers

There chance for just getting across each row would be 50% but there chance of getting across completely is 1 in 18

How do you solve x+20<-10

Answers

Answer:

X = - 31

Step-by-step explanation:

The < always faces the largest number so do. -10-20= - 30 so any number bellow that e.g.-31, -45 will be correct I think

For males in a certain town, the systolic blood pressure is normally distributed with a
mean of 125 and a standard deviation of 5. What percentage of males in the town that
have a systolic blood pressure higher than 131, to the nearest tenth?

Answers

Answer:

11.5 %

Step-by-step explanation:

mean- 125 | sd: 5

z-score: 131-125/5= 6/5= 1.2

for z= 1.2, percent: 88.49 %

100-88.49= 11.51 -> 11.5

Help I’m timed!

The graph of an equation with a negative discriminant always has which characteristic?

A: no x-intercept

B:no y-intercept

C: no maximum

D: no minimum

Answers

Answer:

a

Step-by-step explanation:

Negative discriminant means that the fucntion has no real roots

so in the quadratic function b^2-4ac if this section is negative there are no real roots, so yes a would be the answer

Bonus: if u want to know.

However, in linear algebra which ofc i know ur not taking there would be something called imangiary roots, or complex roots.

The perimeter of a rectangle is 21+ 2where is the
length of the rectangle and wis the width find the
Perimeter of the rectangle if the length is 12 inches and the width is 9 inches

Answers

Answer:19 - 20

Step-by-step explanation:

Yo

Plz help I need help

Answers

Answer: -3.2b  + 9

Step-by-step explanation:

1. Remove parentheses.

-6.5b + 11 + 3.3b - 2

2. Add -6.5b and 3.3b.

-3.2b + 11 - 2

3. Subtract 2 from 11.

-3.2b + 9

♪Answer : -6.5b + 11 + 3.3b - 2= (-6.5b + 3.3b) + (11 - 2)= (3.3b - 6.5b) + 9 = -3.2b + 9

$32.00for a 14 2/9 km taxi ride. What is the cost per kilometer

Answers

[tex]\begin{array}{ccll} \$&km\\ \cline{1-2} 32&14\frac{2}{9}\\[1em] x&1 \end{array}\implies \cfrac{32}{x}=\cfrac{14\frac{2}{9}}{1}\implies \cfrac{32}{x}=14\frac{2}{9}\implies \cfrac{32}{x}=\cfrac{14\cdot 9+2}{9} \\\\\\ \cfrac{32}{x}=\cfrac{128}{9}\implies 288=128x\implies \cfrac{288}{128}=x\implies \stackrel{~\hfill \textit{2 bucks and 25 cents}}{\cfrac{9}{4}=x\implies 2\frac{1}{4}}=x[/tex]

Question 24 of 25
Which of these shows the result of using the first equation to substitute for y
in the second equation, then combining like terms?
y = 3x
3x + 2y = 18
ОА. Зу = 18
B. 3x = 18
O C. 9x = 18
O D, 6x = 18
SUBMIT

Answers

Answer:

C. 9x=18

Step-by-step explanation:

3x+2(3x)=18

3x+6x=18

9x=18

Find m/_ABC if BD is an angle bisector of ABC

Answers

Answer:

im not quite sure but i think u do it like this:

Step-by-step explanation:

4x-6=x+6

(add 6 to both sides as well as subtracting x from both sides)

3x=12

(divide 3 from both sides)

x=4

Please help I do not understand thanks

Answers

I don’t think I can help you with this, but I hope you have a nice day and figure it out!

A girl has 7 skirts, 9 blouses, and 4 pairs of shoes. How many different skirt-blouse-shoe outfits can she wear

Answers

Answer: 252 i think i tried and i think its right

At a sale this week, a table is being sold for $119. This is a 65% discount from the original price.
What is the original price?

Answers

Answer:

77,35

Step-by-step explanation:


[tex]2 {}^{3} \times 2 - {}^{3} [/tex]
I need answers

Answers

The answer is 13 I might be wrong but I think it’s 13
The answer is 13

Step by step

2^3 x 2 - 3=
2 x2 x2=8
8 x2=16
16-3=13
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