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Ber [7]
3 years ago
10

What is the steps and answer to do this question -x-7y=9 -x+9y=-23

Mathematics
1 answer:
Hitman42 [59]3 years ago
7 0
The answer is 23.

Good luck :)
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Colby worked three more hours on tuesday than he did on monday. on wednesday, he worked one hour more than twice the number of h
bulgar [2K]
Monday = X
Tuesday = X + 3 (Problem says three more hours than he worked on Monday)
Wednesday = 2x + 1
(Problem says he worked 1 hour more than two times the number of hours on monday) 
This side of the equation would be - 
X + (X +3) + (2X + 1) 
That's monday plus tuesday plus wednesday. 
Then you would set up the other side of the equation. 
This would be the total number of hours so it would be equal to monday, tuesday and wednesday combined. 
2 + (5x) 
Two hours more than five times the amount of Monday (X) 

Now we put this together to have an equation 
X + (X + 3) + (2x+ 1) = 2 + 5x 
Now we need to collect like terms
4x + 4 = 2 + 5x 
I just simplified the left side of the equation
Now I will subtract 4x from the left side to get all the variables on one side 
4 = 2 + x 
Now I subtract 2 to get the numbers both on one side
2 = x 
So, Colby worked 2 hours on Monday.
6 0
4 years ago
Triangle XYZ is isosceles. Angle Y measures a°. What expression represents the measure of angle X?
lara [203]
The isosceles triangle has two sides congruent which mean they are equal. If two sides are equal, it also means that two angles are equal. 

For triangle XYZ, we have angles shown below:
∠X + ∠Y + ∠Z = 180°

If ∠Y = a°, then we can have the expression for ∠X such as shown below:
∠X + a° + ∠Z =180°
∠X= 180° - a° - ∠Z

If ∠Z = ∠Y, then we have the final expression:
∠X = 180° -2a°
4 0
3 years ago
Madison made 1 & 1/2 gallons of punch she used 2 pints of punch 3 quarts of ginger ale the rest was orange juice how many qu
antoniya [11.8K]

Answer:

2 quarts of orange juice

Step-by-step explanation:

If she made 1&1/2 gallons and, excluding orange juice, she used 2 pints (1quart) and 3 quarts that is 1 gallon (without orange juice) if we then subtract what we have from our total we are left with 1/2 gallon (aka: 2quarts) meaning we have a remaining 2 quarts of orange juice

8 0
3 years ago
Graph the following word problem and then write an equation: Jamal started with $4 in his savings and makes an additional $3 per
Yakvenalex [24]

Answer:

use desmos

Step-by-step explanation:

put y=3x+4 and make a graph from that its really helpful trust me

8 0
3 years ago
MAtHhHhHHhhHHHH Ughhhhhhhhhh
yan [13]

The probability of three independent events happening one after the other is the multiplication of the probability of the single events.

The probability of spinning an odd number is 5/10=1/2, because there are 5 odd numbers (1,3,5,7 and 9) out of the 10 numbers from 1 to 10.

The probability of spinning a number less than 4 is 3/10, because there are 3 numbers (1,2 and 3) that are less than 4 out of the 10 numbers from 1 to 10.

The probability of spinning a 7 is 1/10, because you only have one good outcome out of 10.

So, the probability of winning the game is

\dfrac{1}{2}\times\dfrac{3}{10}\times\dfrac{1}{10} = \dfrac{3}{200}

3 0
3 years ago
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