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2 years ago

Solve the system by elimination. Show all work. -2x-6y=-18 and 2x-y=4

Mathematics

1 answer:

lorasvet [3.4K]2 years ago

4 0

(3,2)

Steps in photo

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How can you decide which operation to use to solve a two step equation

OleMash [197]

Always use the inverse (opposite) operation. Ex. is 2x+4=10.

First subtract 4, and then divide by 2.

actually reverse of order of operations to solve.

4 0

3 years ago

Name the algebraic property demonstrated in the example below: x • y • z = y • x • z (1 point) distributive property transitive

Lina20 [59]

The correct answer is the commutative property of multiplication. This states that 2 or more numbers can be multiplied in either order.

6 0

3 years ago

Read 2 more answers

Locating Zeros of Polynomial Function:<br>Approximate the real zeros to the nearest tenth

solmaris [256]

we are given

$f(x)=2x^4-x^3+x-2$

we can check each options

option-A:

-1,1

we can plug x=-1 and x=1 and check whethet f(x)=0

At x=-1:

$f(-1)=2(-1)^4-(-1)^3+(-1)-2$

$f(-1)=0$

At x=1:

$f(1)=2(1)^4-(1)^3+(1)-2$

$f(1)=0$

so, this is TRUE

option-B:

0,1

we can plug x=0 and x=1 and check whethet f(x)=0

At x=0:

$f(0)=2(0)^4-(0)^3+(0)-2$

$f(0)=-2$

At x=1:

$f(1)=2(1)^4-(1)^3+(1)-2$

$f(1)=0$

so, this is FALSE

option-C:

-2,-1

we can plug x=-2 and x=-1 and check whethet f(x)=0

At x=-2:

$f(-2)=2(-2)^4-(-2)^3+(-2)-2$

$f(-2)=36$

At x=-1:

$f(-1)=2(-1)^4-(-1)^3+(-1)-2$

$f(-1)=0$

so, this is FALSE

option-D:

-1,0

we can plug x=-1 and x=0 and check whethet f(x)=0

At x=-1:

$f(-1)=2(-1)^4-(-1)^3+(-1)-2$

$f(-1)=0$

At x=0:

$f(0)=2(0)^4-(0)^3+(0)-2$

$f(0)=-2$

so, this is FALSE

5 0

3 years ago

The perimeter of a rectangle is 1144 ft. It’s length is three times it’s width.find the dimensions of the rectangle.

AVprozaik [17]

Answer:

$Length= 429 feet\\Width=143feet$

Step-by-step explanation:

Perimeter of the rectangle= 1144 feet

Length=3*Width

L=3*W

Perimeter of rectangle:

$2(Length+Width)\\\\ 1144=2(3W+W)\\\\ 1144/2=3W+W\\\\ 572=4W\\\\ W=572/4\\\\ W= 143 feet\\\\Width=143 feet\\\\Length=3*143=429 feet\\\\$

The Dimension of the rectangle is :

$Length= 429 feet\\Width=143feet$

8 0

3 years ago

Simplify the expression by arranging the steps in sequence, based on the order of operations 1/6 (30x 24)-1/7(63x-7x) please he

Lerok [7]

Answer:

if you Simplify the expression it is 112x

(or 120-8x if 30x 24 is multiplication)

7 0

2 years ago