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3 years ago

(11x+9)+(5x-9) pls solve this for me I have no clue and i need this fast

Mathematics

1 answer:

Alex Ar [27]3 years ago

3 0

Answer:

16x+0

Step-by-step explanation:

Collect like terms

11x+5x+9-9

Then add and subtract them

16x+0

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Square root of 0.7056

aniked [119]

Answer:

.84

Step-by-step explanation:

√ .7056 put in calculator

8 0

3 years ago

Give the values of a, b, and c needed to write the equation's standard form. (5 + x)(5 - x) = 7 A = 1; B = 0; C = -18 A = 25; B

Bad White [126]

$(5+x)(5-x)=7\\\\\text{use:}\ (a-b)(a+b)=a^2-b^2\\\\5^2-x^2=7\\\\25-x^2=7\ \ \ |-7\\\\18-x^2=0\\\\x^2-18=0$

$Answer:\ \boxed{A=1;\ B=0;\ C=-18}$

7 0

3 years ago

Read 2 more answers

The ratio of students in Class X to Class Y is 2 : 5. There are 24 more students in Class Y than Class X. How many students must

Natalka [10]

Answer: 12 students

Step-by-step explanation:

Let X and Y stand for the number of students in each respective class.

We know:

X/Y = 2/5, and

Y = X+24

We want to find the number of students, x, that when transferred from Y to X, will make the classes equal in size. We can express this as:

(Y-x)/(X+x) = 1

---

We can rearrange X/Y = 2/5 to:

X = 2Y/5

The use this value of X in the second equation:

Y = X+24

Y =2Y/5+24

5Y = 2Y + 120

3Y = 120

Y = 40

Since Y = X+24

40 = X + 24

X = 16

Now we want x, the number of students transferring from Class Y to Class X, to be a value such that X = Y:

(Y-x)=(X+x)

(40-x)=(16+x)

24 = 2x

x = 12

12 students must transfer to the more difficult, very early morning, class.

7 0

2 years ago

Which system of equations has no solutions?

IceJOKER [234]

what are the options? your question seems incomplete

7 0

3 years ago

The Johnson Farm has 500 acres of land allotted for cultivating corn and wheat. The cost of cultivating corn and wheat (includin

babunello [35]

Answer:

He should plant 100 acres of corn and 400 acres of wheat.

Step-by-step explanation:

This problem can be solved by a siple system of equations.

]x denotes the number of acres of corn

y denotes the number of acres of wheat

Building the system:

The Johnson Farm has 500 acres of land allotted for cultivating corn and wheat. This means that:

$x + y = 500$

The cost of cultivating corn and wheat (including seeds and labor) is $42 and $30 per acre, respectively. Jacob Johnson has $16,200 available for cultivating these crops. This means that:

$42x + 30y = 16,200$

So, we have the following system

$1) x + y = 500$

$2) 42x + 30y = 16,200$

If he wishes to use all the allotted land and his entire budget for cultivating these two crops, how many acres of each crop should he plant?

$1) x + y = 500$

$2) 42x + 30y = 16,200$

I am going to write y as a function of x in 1), and replace in 2). So:

$x + y = 500$ means that $y = 500-x$

$42x + 30y = 16,200$

$42x + 30(500-x) = 16,200$

$42x + 15000 - 30x = 16,200$

$12x = 1,200$

$x = \frac{1,200}{12}$

$x = 100$

Now, going back to 1:

$y = 500 - x = 500 - 100 = 400$

He should plant 100 acres of corn and 400 acres of wheat.

5 0

3 years ago