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2 years ago

Solve the system: x+4y=1 3x+5y=10

Mathematics

1 answer:

never [62]2 years ago

4 0

Answer:

$x=6.25\\y=-1.25$

Step-by-step explanation:

$3x+5y=10\\x+3y=1\\\\$

Second equation times 3:

$3x+9y=3$

1st equation minus equation above:

$-4y=7\\y=-7/4$

Insert to equation:

$3x+\frac{-35}{4}=10\\12x-35=40\\12x=75\\x=75/12=6.25$

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Rita bakes cakes to earn money. She spent $30 for supplies to make 15 cakes. Which inequality shows how much Rita has to charge

Alex Ar [27]

First we have to see the formula of profit, which is

$Selling \ price - cost \ price = profit$

And it is given that profit should be atleast $150, that is

$Profit \geq 150 \\ Selling \ price - cost \ price \geq 150$

Let Ritax dollars per cake, so for 15 cakes, she charge 15x .

And she epent 30 dollars for 15 cakes.

So we will get

$15x-30 \geq 150$

Adding 30 to both sides

$15x \geq 180 \\ x \geq 12$

Correct option is the second option .

5 0

2 years ago

Read 2 more answers

Tell whether the angles are complementary or supplementary. Then find the value of x

skelet666 [1.2K]

Answer:

complementary

x = 55

Step-by-step explanation:

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2 years ago

Which of the following is the graph of y=squareroot(-x-3)

Nata [24]

Answer:

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Step-by-step explanation:

6 0

3 years ago

Molly uses 9.5 pints of blue paint and white paint to paint her bedroom walls. 3 4 of this amount is blue paint, and the rest is

Vilka [71]

Answer:

2.375 pints

Step-by-step explanation:

Since 3/4 of the paint is blue, the remaining 1/4 of the paint is white. 1/4 of the total amount is ...

(1/4)(9.5 pints) = 2.375 pints . . . . of white paint

5 0

3 years ago

Please solve this question withvfull process i will wark as braineast a) After allowing 5 % discount on the marked price of a ra

schepotkina [342]

Answer:

Let the marked price be x

Discount % = 10%

Discount = 10\% \times x = 0.1x10%×x=0.1x

Cost after discount = x-0.1x = 0.9x

10%vat is charged on it

Cost including VAT = 0.9x+0.1(0.9x)=0.99x0.9x+0.1(0.9x)=0.99x

We are given that it's price became rs 1672

So, 0.99x = 1672

x=\frac{1672}{0.99}x=0.991672

x=1688.88

Discount = 0.1x=0.1(1688.88)=168.888

Hence The discount

7 0

3 years ago