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2 years ago

Solve the system of equations 3x + y = 3 x + y = 2

Mathematics

1 answer:

Pachacha [2.7K]2 years ago

4 0

Answer:

(1/2, 3/2)

Step-by-step explanation:

solve the 1st variable in one of the equations and then substitute it and the result will be turned into the other equation.

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Two shops, Waitroze and Budgins sell the same brand of cans of soup but with different offers.

Goshia [24]

Answer:

24 cans at Waitrose would be £10.05.

24 cans at Budgins would be £11.56.

Step-by-step explanation:

Times the waitrose offer by 3

Times the budgins offer by 4

Hope that helped. x

6 0

1 year ago

On a math test , you scored 69 out of a total of 75 points. what percent did you get ?

Black_prince [1.1K]

Simple, to find the percentage you scored on your test, take

What you got= 69
Total=75

Divide,

69/75=0.92

Finally, multiply by 100.

0.92*100=92

<span>You got a 92% on the math test.</span>

8 0

2 years ago

At on auto repair shop, 14 of the 56 cors received

natita [175]

9514 1404 393

Answer:

25%

Step-by-step explanation:

The percentage is found by multiplying the fraction by 100%.

(oil changes)/(total cars) = 14/56 × 100% = 25%

25% of the cars received oil changes.

4 0

2 years ago

Rewrite 2tan3x in terms of tanx

blsea [12.9K]

$2\tan3x=2\tan(2x+x)=\dfrac{2\tan2x+2\tan x}{1-\tan2x\tan x}$

Use the same identity to expand $\tan2x$ .

$\tan2x=\tan(x+x)=\dfrac{\tan x+\tan x}{1-\tan x\tan x}=\dfrac{2\tan x}{1-\tan^2x}$

$\implies2\tan3x=\dfrac{2\dfrac{2\tan x}{1-\tan^2x}+2\tan x}{1-\dfrac{2\tan x}{1-\tan^2x}\tan x}$
$2\tan3x=\dfrac{2\tan x\left(\dfrac2{1-\tan^2x}+1\right)}{1-\dfrac{2\tan^2x}{1-\tan^2x}}$
$2\tan3x=\dfrac{2\tan x\left(2+1-\tan^2x\right)}{1-\tan^2x-2\tan^2x}$
$2\tan3x=\dfrac{2\tan x(3-\tan^2x)}{1-3\tan^2x}$

4 0

2 years ago

A stuffed animal that originally cost $120 is on sale for $80. By what percent has the original cost been reduced

Otrada [13]

Answer:

The cost has been reduced by approximately 33%.

Step-by-step explanation:

1% of 120 is 1.2.

80 divided by 1.2 is 66.66666666...

Meaning that $80 is about 66% of the original cost. Therefore, about 33% of the cost was removed.

Hope this helps

5 0

1 year ago