All categories

3 years ago

Evaluate 3x - 4y + 11 for x = -2 and y = -1

Mathematics

2 answers:

katrin [286]3 years ago

7 0

Answer:

Step-by-step explanation:

Plug in -2 for x, and -1 for y, and solve:

3x - 4y + 11

3(-2) - 4(-1) + 11

Remember to follow PEMDAS. First, multiply. Remember, that when you multiply:

2 positive signs will result in a positive answer.

1 positive & 1 negative will result in a negative answer.

2 negative will result in a positive answer.

3 * -2 = -6

-4 * -1 = 4

-6 + 4 + 11 = 9

9 is your answer.

sukhopar [10]3 years ago

5 0

Answer:

Step-by-step explanation:

3x - 4y + 11

When x = -2 and y = -1

Then,

3(-2) -4(-1) + 11

-6 + 4 + 11

- 2 + 11

You might be interested in

a rectangular blue tile has a length of 4.25 inches and a width of 6.75 inches. a similar tile has a length of 12.75 inches.what

Iteru [2.4K]

Answer:

The width of the red tile would be $2.25$ inches.

Step-by-step explanation:

Given blue tile has a length of $4.25$ inches, and a width of $6.75$ inches.

Also, length of similar tile is $12.75$ inches.

Let us assume $x$ as the width of red tile.

It is given in the question that both tiles are similar.

So, their area will be the same.

Area of blue tile would be $4.25\times 6.75=28.6875\ inch^2$

Area of red tile would be $12.75\times x$

The area of blue tile would be equal to area of red tile.

$28.6875=12.75\times x$

$\frac{28.6875}{12.75}=x\\\\x=2.25$

So, the width of the red tile would be $2.25$ inches.

5 0

2 years ago

Solve: p+2÷6 -p-3÷3 = p

Xelga [282]

Answer:

p = - $\frac{2}{3}$

Step-by-step explanation:

you have to simplify the left side of the problem first
the 2 p's cancel each other out
now you have to do order of operations

Parenthesis

Exponents

Multiplication

Division

Addition

Subtraction

2 ÷ 6 = 1/3
-3 ÷ 3 = -1

1/3-1 = p

p= - $\frac{2}{3}$

7 0

2 years ago

Four more than seven times a number is 12.” Write an equation that represents the statement. Then solve.

Leona [35]

7x + 4 = 12

7x = 12-4

7x = 8

x = 7/8

3 0

3 years ago

Quadratic equation has 5x+0 as a linear factor what value is a zero of the associated quadratic function.

natka813 [3]

9514 1404 393

Answer:

x = 0

Step-by-step explanation:

The zero is the value of x that makes the linear factor zero:

5x +0 = 0

5x = 0 . . . . . simplify

x = 0/5 = 0 . . . . divide by 5

The associated zero is x = 0.

7 0

2 years ago

Need help fast please thanks

murzikaleks [220]

Answer:

c = 41 ft

Step-by-step explanation:

To solve this problem, we can use the pythagorean theorem, which is defined by the formula $a^2+b^2=c^2$ . We are given both the lengths of the legs, so all we need to do is to plug them both in and solve for c:

$9^2+40^2 = c^2\\c^2 = 81 + 1600\\c^2 = 1681\\c = 41$

This is the first option.

8 0

3 years ago