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3 years ago

Substitution methode:

Mathematics

1 answer:

Ket [755]3 years ago

7 0

It should be 4x-(2x-5)=7.

$4x-(2x-5)=7\\
4x-2x+5=7\\
2x=2\\
x=1$

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Whats the value of -12-(-35)

sergey [27]

The answer is -420 (negative four-hundred and twenty)

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4 years ago

Please help with this asappppppppll

Alenkinab [10]

We are given with a circle and we need to find the equation of the circle , but first let's recall that , the equation of a circle with radius 'r' and centre at (h,k) is given by ${\bf{(x-h)^{2}+(y-k)^{2}=r^{2}}}$

Now , here as as the circle cuts the +ve x-axis at (9,0) . So , it's radius is 9 units or the 2nd way is to measure the distance from centre of the circle to the point where the circle cuts the graph , as the centre is at Origin , so here (h,k) = (0,0) .Which means that the centre is located at the point whose coordinates are (0,0) which is also known as origin . Now , finding the equation of the circle :-

${:\implies \quad \sf (x-0)^{2}+(y-0)^{2}=(9)^{2}}$

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7 0

3 years ago

During a sale a store offered a 35% discount on a particular camera that was originally priced at $234. After the sale, the disc

ch4aika [34]

Answer: $205.33

Step-by-step explanation:

We know the original price was $234, during the sale there was a 35% discount, let's found out what that is...

234 * (100% - 35%)

234 * (65%)

234 * (0.65)

= 152.1

After the sale, the price was increased by 35%, remember percentages are out of 100...

100% + 35% = 135%

135% = 1.35

152.1 * 1.35

= $205.33

The price of the camera after the increase is $205.33, I hope this helps!

8 0

4 years ago

Which numbers are possible solutions to the inequality... (SELECT ALL THAT APPLY)

baherus [9]

1. you didn't add anything

2. x>-4

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3 years ago

Given the system of equations, what is the solution?

Elena L [17]

Answer:

{(-34/7, -16/7)}

Step-by-step explanation:

Rearrange values, multiply to solve for x.

(5) 2y = 3x + 10

(-2) 5y = 4x + 8

Solve for x.

10y = 15x + 50 ↓

-10y = -8x -16

Combine and evaluate.

0 = 7x + 34

Subtract 34 from both sides.

7x = -34

Divide both sides by 7.

x = $\frac{-34}{7}$

Plugin x value into either equation to solve for y.

2y = (3 × $\frac{-34}{7}$ ) + 10

2y = $\frac{-102}{7}$ + 10

2y = $\frac{-32}{7}$

y = $\frac{-16}{7}$

7 0

3 years ago