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kap26 [50]
2 years ago
7

C) Solve the system by substitution. x + 2y = -1 x- y = 5

Mathematics
1 answer:
barxatty [35]2 years ago
4 0
First set 2nd equation to x.
X=5+y
Then substitute that for x in the 2nd equation.
5+y +2y = -1
So 3y = -6
Or y = -2

Then substitute -2 for y in first equation
X-(-2) = 5
Or x + 4 = 5
X= 1
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stira [4]

Hey there!

To solve this, we can use division. First, lets turn 1 \frac{1}{4} into an improper fraction:

\frac{5}{4}

So, we have

\frac{5}{4} / \frac{1}{2}

We can multiply by the reciprocal:

\frac{5}{4} *\frac{2}{1}

That gives us

\frac{10}{4} =\frac{5}{2} =2\frac{1}{2}

Hope it helps and have a great day!

3 0
3 years ago
I Music at the art museum is divided into six sections that each contain about the same number of tiles there are 2889 tails tot
Delicious77 [7]

Answer:

481.5

Step-by-step explanation:

The music art museum is divided into 6 sections

Each section contains the same timert of tiles

There are 2889 tails total

Therefore the number of tiles in each section can be calculated as follows

= 2889/6

= 481.5

Hence there are 481.5 tiles in each section

3 0
3 years ago
Given the function f(x) = -5x2 +4, what is the value of f(-5)?
Akimi4 [234]

Step-by-step explanation:

f(-5)=-5(-5)²+4

f(-5)=5(25)+4

f(-5)=125+4

f(-5)=129

8 0
3 years ago
Ashley has sold 70% of the 20 candy bars she has to. How many candy bar's does she have left to sell
yawa3891 [41]
She has 6 left.
70%= 0.7
0.7 x 20 = how many she has sold (14)
OR
30%=0.3
0.3 x 20= how many she hasn't sold (6)


4 0
4 years ago
Read 2 more answers
the temperature t at which water boils is inversely proportional to the number of feet F the water is above sea level. write the
Fudgin [204]

Answer:

Water temperature in an ocean varies inversely to the water’s depth. Between the depths of 250 feet and 500 feet, the formula

T

=

14

,

000

d

gives us the temperature in degrees Fahrenheit at a depth in feet below Earth’s surface. Consider the Atlantic Ocean, which covers 22% of Earth’s surface. At a certain location, at the depth of 500 feet, the temperature may be 28°F.

3 0
3 years ago
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