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Temka [501]
2 years ago
5

Solve the system of equations.

Mathematics
1 answer:
hjlf2 years ago
3 0
Ok so the question has already been answered by someone but i wanna give you some advice... it’s called ✨photomath✨ and you can take a picture of the problem or type it in... it would have been able to solve this equation right away, so you wouldn’t have had to wait for someone to answer. have a great day :)
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Q6. Solve
kati45 [8]

4x + 3y = 5...(1)
2x + 3y = 1...(2)

(2)*2:
4x+6y=2...(3)

(1)-(3):
4x+3y-(4x+6y)=5-2
4x+3y-4x-6y=3
-3y=3
y=-1

By sub. y=-1 in (2), we have
2x+3(-1)=1
2x-3=1
2x=4
x=2
The solution is x=2,y=-1
4 0
3 years ago
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What is the exact area of a circle with a diameter of 18 feet?
Kitty [74]
The formula for the area of a circle is 

\pi  r^{2}

We know the diameter, and the radius is half of the diameter.  So the radius is 9.  Now we plug that into the formula.

\pi  9^{2} =81 \pi

So the answer is B, 81 pi square feet
7 0
3 years ago
Claire and Lauren are sisters. Their mom gives them each a weekly allowance. Claire gets $5 more than Lauren a week. How much do
valkas [14]
We don't know the amount they get but the equation would be Claire 5 + a
5 0
3 years ago
1 3/4 − 4/5 = 35 twentieths − what fraction???<br><br>Plss help will give brainliest :)
7nadin3 [17]

let's firstly convert the mixed fractions to improper fractions and then to do away with the denominators, let's multiply both sides by the LCD of all denominators.

\stackrel{mixed}{1\frac{3}{4}}\implies \cfrac{1\cdot 4+3}{4}\implies \stackrel{improper}{\cfrac{7}{4}} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{7}{4}-\cfrac{4}{5}=\cfrac{35}{20}-\boxed{?}\implies \stackrel{\textit{multipling both sides by }\stackrel{LCD}{20}}{20\left( \cfrac{7}{4}-\cfrac{4}{5} \right)=20\left( \cfrac{35}{20}-\boxed{?} \right)} \\\\\\ 35-16=35-20\boxed{?}\implies 19=35-20\boxed{?}\implies -16=-20\boxed{?} \\\\\\ \cfrac{-16}{-20}=\boxed{?}\implies \cfrac{4}{5}=\boxed{?}

8 0
2 years ago
Read 2 more answers
Phil has 19 other students in his math class. During class one day, the teacher asks for a volunteer to come up to the board. If
Stolb23 [73]

Answer:

1/20

Step-by-step explanation:

if you do all kids there is 20. you have a 1 out of 20 people change so plz give brainest answer

7 0
3 years ago
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