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NARA [144]
3 years ago
13

X= 2 y-4 7 x + 5y = -66

Mathematics
1 answer:
Mars2501 [29]3 years ago
6 0

Answer:

−7x−5y=4 - 7 x - 5 y = 4. Rewrite in slope-intercept form. Tap for more steps... The slope-intercept form is y=mx+b y = m x + b , where m m is the slope and b b is ...

Step-by-step explanation:

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It took María 3 hours to read 120 pages. How many pages can she read in 1 hours at the same rate?​
levacccp [35]

Answer:

40 pages.

Step-by-step explanation:

120/3=40

Maria is reading 40 pages every hour.

6 0
3 years ago
Sarah is paid $20 an hour at her new job. She wishes to graph her total pay y, as a function of the
icang [17]

Answer:

see image; 200; 400

Step-by-step explanation:

y=20x

graph

6 0
3 years ago
Find the product of ( 2a2– 3b2) and ( a +b2- 3z)​
Bond [772]

Answer:

2a^3+2a^2b^2-6a^2z-3ab^2-3b^4+9b^2z

Step-by-step explanation:

(2a^2-3b^2)(a+b^2-3z)

Start by distributing the 2a^2 into all of the terms in between the second parentheses.

2a^3+2a^2b^2-6a^2z

Next, distribute the -3b^2 into all of the terms in between the second parentheses.

-3ab^2-3b^4+9b^2z

For the sake of simpler interpretation, I separated the two above, but they are together:

2a^3+2a^2b^2-6a^2z-3ab^2-3b^4+9b^2z

Since the terms are already in descending order, we do not need to rearrange them.

4 0
3 years ago
Which of these equations, when solved, gives a different value of x than the other three? 9.1 = -0.2x + 10 10 = 9.1 + 0.2x 10 –
garik1379 [7]

Given:

Different equations are given.

Rhyan paid using a gift card that had $22.20 on it. After the sale, Rhyan's gift card had $1.90 remaining.

To find:

The equation which gives a different value of x than the other three.

To find the equations that could you use to find the price of one tire patch.

Solution:

In option A,

9.1 = -0.2x + 10

0.2x= 10-9.1

0.2x= 0.9

Divide both sides by 0.2.

x=\dfrac{0.9}{0.2}

x=4.5

Similarly,

In option B,

10 = 9.1 + 0.2x

0.9= 0.2x

4.5=x

In option C,

10-0.2x = 9.1

-0.2x = -0.9

x = 4.5

In option D,

9.1 – 10 = 0.2x

-0.9 = 0.2x

-4.5 = x

Since option D has difference solution, therefore the correct option is D.

Let price of one tire patch be x.

So, price of 4 tire patches = 4x

Remaining amount in Rhyan's gift card = $1.90

Total amount = $22.20

Price of 4 tire patches + Remaining amount in gift card = Total amount

4x+1.9=22.2

It can be written as

4x-22.2=-1.9,1.9=22.2-4x,22.2-4x=1.9

Therefore, the correct options are C and E.

4 0
3 years ago
Read 2 more answers
What property is applied to simplify the expression (ab)ca =ab(ca)?
matrenka [14]
Distributive property
8 0
3 years ago
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