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3 years ago

Can you please tell me what is -49cd – 7c

Mathematics

1 answer:

REY [17]3 years ago

8 0

Answer:-7c(7d+1)

Step-by-step explanation:

factor -7c out of -49cd-7c

(factor the expression)

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What is the solution of the system?

Kryger [21]

Greetings!

Solve the System, using Elimination:
$\left \{ {{4x+2y=18} \atop {2x+3y=15}} \right.$

Multiply Equation #2 by 2:
$\left \{ {{4x+2y=18} \atop {2(2x+3y)=2(15)}} \right.$

$\left \{ {{4x+2y=18} \atop {4x+6y=30}} \right.$

Eliminate variable x:
$-\frac{ \left \{ {{4x+2y=18} \atop {4x+6y=30}} \right.}{0x-4y=-12}$

$4y=-12$

Divide both sides by 4:
$\frac{4y}{4}= \frac{12}{4}$

$y=3$

Input this value into one of the Equations:
$4x+2y=18$

$4x+2(3)=18$

Simplify:
$4x+6=18$

$(4x+6)+(-6)=(18)+(-6)$

$4x=12$

Divide both sides by 4.
$\frac{4x}{4}= \frac{12}{4}$

$x=3$

The Solution to this System (The Point of Intersection):
$\boxed{(3,3)}$

I hope this helped!
-Benjamin

7 0

3 years ago

What is 4.2 kilometers in meters

vovikov84 [41]

THE ANSWER IS 42,000.

TO GET THIS WE KNOW THAT 1 KILOMETERS IS 10,000.

SO YOU TAKE 4.2 AND MULTIPLY IT BY 10,000. THAT EQUALS 42,000.

4 0

3 years ago

Evan said that the difference between two negative numbers must be negative. Was he right? Use examples to illustrate your answe

vladimir1956 [14]

Yes he is right because if u have

-6 -(-4) u would multiply the 2 signs the - and the -4 and u would get +4

then ur equation becomes -6+4 = -2

8 0

3 years ago

Write a polynomial equation of least degree with roots 2, -1 and 4.

Rasek [7]

A polynomial with roots a and b is (x - a)(x - b).

(x - 2)(x - (-1))(x - 4) = 0

(x - 2)(x + 1)(x - 4) = 0

has roots 2, -1, and 4.

3 0

2 years ago

the perimeter of a rectangle parking lot is 322 m. if the length of the parking lot is 86 m, what is the width

bekas [8.4K]

Perimeter of rec. = 2 ( l + w )

Given: perimeter of rectangle = 322m, length = 86m

Required: width = ?

Solution: 322 = 2 ( 86 + w )
Divide 322 by 2 ie, 322/2 = 86 + w
Will be equal to 161 = 86 + w
Therefore Width= 161 - 86 = 75

4 0

2 years ago

Can you please tell me what is -49cd – 7c​

Can you please tell me what is -49cd – 7c