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vagabundo [1.1K]
3 years ago
9

Help 11 minutes!!!!!!

Mathematics
1 answer:
Marina86 [1]3 years ago
7 0

The ordered pair is only a solution to the first equation, so it is not a solution to the system.

2 x 10 = 20    5 x 5 = 25    20 - 25 = -5     True!

10 + 2 x 5 = 11?    False!    10 + 2 x 5 = 20

So, A and C are the correct answers!

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A family has two cars. The first car has a fuel efficiency of miles 15 per gallon of gas and the second has a fuel efficiency of
polet [3.4K]

The first car consumed 25 gallons of fuel while the second car consumed 30 gallons of fuel.

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more variables and numbers.

Let x represent the first car consumption and y represent the second car consumption, hence:

x + y = 55   (1)

Also:

15x + 20y = 975   (2)

From both equations:

x = 25, y = 30

The first car consumed 25 gallons of fuel while the second car consumed 30 gallons of fuel.

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4 0
1 year ago
shelly is going shopping at the mall to buy three pairs of shoes. she has a coupon for $2 off per pair of shoes after buying the
kvasek [131]
Okay, to start, we can multiply the $2 coupon by two because that is the amount of pairs she is going to by. So it would be $4 off. Now, if all of the shoes she purchased the same price, this is made a little easier. We can simply take $80 and $122 and add it by the $4 discount. Our new numbers would be $84 and $126. Now in order for this to work we would want all the numbers to be the same. We take $84 and divide it by three pairs, to get the values. For the least amount she can spend per pair is $28 and the most amount she can spend per pair is $42. 
4 0
3 years ago
Read 2 more answers
Jan's house has four leaking taps. An average of 34 cL of water leaks from each tap every day. How many litres of water is lost
pshichka [43]

Answer: 42.16l

Step-by-step explanation:

First, we should note that August has 31 days. Since Jan's house has four leaking taps and an average of 34 cL of water leaks from each tap every day. The four taps will leak (34 × 4) = 136 cL everyday.

The amount of litres of water that is lost from these four taps in August would be:

= 136cL × 31

= 4216 cL

= 42.16L

We should note that 100cL = 1L

7 0
3 years ago
Simplify the given polynomial and use it to complete the statement.
Lorico [155]

Answer:

1)  2x^{2}+13

2) Option C.

3) Option B.

Step-by-step explanation:

1. You must apply the Distributive property as following:

(-5x^2-2x+4)+(8x^2-x-1)-(x^{2}-5x+2x-10)

2. Now, you must distribute the negative sign, then you have:

-5x^2-2x+4+8x^2-x-1-x^{2}+5x-2x+10

3. Finally, you must add the like terms. Then you obtain the polynomial:

2x^2+13

4. By definition, a polynomial that has two terms is classified as a binomial. Therefore, the answer is the option C.

5. The degree of a polynomial is determined by highest exponent of the variable. So, it is a polynomial of degree 2 (option B).

4 0
3 years ago
Read 2 more answers
If r(x) = 2 – x2 and w(x) = x – 2, what is the range of ? (w0r)(x)
TiliK225 [7]

Answer:

The range would be all real numbers

Step-by-step explanation:

In order to find (wor)(x), we need to start with the w(x) equation and then input the r(x) equation for every x in the w(x) equation.

w(x) = x - 2

(wor)(x) = (2 - x^2) - 2

(wor)(x) = -x^2

Given this equation, we know that x can be all real numbers

4 0
3 years ago
Read 2 more answers
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