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2 years ago

Solve the system by substitution. - 2x + 7y = 15 6y = х

Mathematics

1 answer:

ruslelena [56]2 years ago

7 0

Tuch CG GC bnmkgcc hhdnjxuxjfu yckfk. Icing

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lbvjy [14]

Answer:

Step-by-step explanation:

The opposite angles in a cyclic quadrilateral are supplementary. The sum of the opposite angles is equal to 180˚

x+100=180

x=180-100=80

3 0

2 years ago

A punch recipe calls for mixing 7 parts of cranberry juice with 4 parts of lemon juice. Find how much cranberry juice should be

e-lub [12.9K]

Answer:

4:7 - Proportion

7 - cranberry juice

4 - lemon juice

Cranberry juice = 147

Step-by-step explanation:

5 0

2 years ago

Which of the following shows the correct solution steps and solution to 7x-4= -18?

Leya [2.2K]

The second one because look at what everything’s it adds up to add it all up and you get the second one

3 0

2 years ago

Which two values of x are roots of the polynomial below?<br> x2-11x + 15

Alex787 [66]

The two values of roots of the polynomial $x^{2}-11 x+15$ are $\frac{11+\sqrt{61}}{2} \text { or } \frac{11-\sqrt{61}}{2}$

<u>Solution:</u>

Given, polynomial expression is $x^{2}-11 x+15$

We have to find the roots of the given expression.

In order to find roots, now let us use quadratic formula.

$x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$

Given that $x^{2}-11 x+15$

Here a = 1, b = -11 and c = 15

On substituting the values we get,

$x=\frac{-(-11) \pm \sqrt{(-11)^{2}-4 \times 1 \times 15}}{2 \times 1}$

$\begin{array}{l}{x=\frac{11 \pm \sqrt{121-60}}{2}} \\\\ {x=\frac{11 \pm \sqrt{61}}{2}} \\\\ {x=\frac{11+\sqrt{61}}{2} \text { or } \frac{11-\sqrt{61}}{2}}\end{array}$

Hence, the roots of given polynomial are $\frac{11+\sqrt{61}}{2} \text { or } \frac{11-\sqrt{61}}{2}$

6 0

2 years ago

Carlos takes classes at both Westside Community College and Pinewood Community College. At Westside, class fees are $ 98 per cre

Sholpan [36]

Answer:

x + y = 13

98x + 115y = z

Step-by-step explanation:

Let x represent the time spent taking class in Westside community college

Let y represent the time spent taking class in Pinewood community college

Let z represent the combined total amount paid for the class fees.

The total combined time for the two school is given as:

x + y = 13.

For the combined total amount; we multiply the price for each school with the time spent on the school and sum them together.

Westside: $98 * x = 98x$

Pinewood: $115 * y = 115y$

The combined total amount represented as z is given as:

z = 98x + 115y

7 0

3 years ago

Solve the system by substitution. - 2x + 7y = 15 6y = х​

Solve the system by substitution. - 2x + 7y = 15 6y = х