Solve the system by the elimination method.
3x - 2y - 7 = 0
5x + y - 3 = 0
To eliminate y, the LCM is 2. Which of the following is the resulting equations?

1.3x - 2y - 7 = 0
5x + y - 3 = 0

2.3x - 2y - 7 = 0
-10x - 2y + 6 = 0


3.3x - 2y - 7 = 0
10x + 2y - 6 = 0

Answer:

x = √y+18

Step-by-step explanation:

Given

[tex]y = x^2-18[/tex]

In order to solve the equation for x, we have to isolate x on one side of the equation

So,

[tex]y+18 = x^2 -18 + 18\\y + 18 = x^2[/tex]

We have to find the value for x, so taking square root on both sides

[tex]\sqrt{x^2} = \sqrt{y+18}[/tex]

Solving the squre root

x = [tex]x = \sqrt{y + 18}[/tex]

Hence,

x = √y+18 is the correct answer ..

Answer:

1. a. 3xy²(7x²y³ + 5x - 4y)

2. a. (3x + 2)(5x + y)

3. d. (2a + b)(5x - 4)

Step-by-step explanation:

For #1, your answer was missing an exponent, which I boldfaced. Every term has a y² in common. Then, in numbers 2 and 3, just factor each group one at a time.

Ex: [10ax + 5bx] - [8ay - 4by]

In the given equation, x is the amount of merchandise she sold.

Replace x with 1900 and solve.

0.24(1900) + 300 = 456 + 300 = 756

Her salary would be $756

Answer:

Step-by-step explanation:

https://brainly.com/question/2264840 Link to this question, but the answer is:

Carissa receives 17$ for each 100$ of merchandise she sells.This is on top of the traditional rate of 300 dollars a month.She will make 623$ for 1900$ worth of merchandise.

Answer:

D

Step-by-step explanation:

Since the triangle is right using the cosine ratio to solve for BC

noting that the exact value of cos45° = [tex]\frac{1}{\sqrt{2} }[/tex], so

cos45° = [tex]\frac{BC}{AC}[/tex] = [tex]\frac{BC}{n}[/tex]

Multiply both sides by n

n × cos45° = BC

n × [tex]\frac{1}{\sqrt{2} }[/tex] = BC

[tex]\frac{n}{\sqrt{2} }[/tex] × [tex]\frac{\sqrt{2} }{\sqrt{2} }[/tex] = BC

Hence BC = [tex]\frac{n\sqrt{2} }{2}[/tex] → D

The right-angle triangle is given with one angle of 45 degrees. The length of segment BC is n√2/2.

A right-angle triangle is a triangle that has a side opposite to the right angle the largest side and is referred to as the hypotenuse.

The angle of a right angle is always 90 degrees.

Since the triangle is right angle

by using the cosine ratio to solve for BC

The value of cos45° = 1/√2 ,

So,

cos45° = BC / AC = BC / n

Multiply both sides by n

n × cos45° = BC

n × 1/√2 = BC

n/√2 × √2 /√2 = BC

Hence, BC = n√2/2

Learn more about a right angle;

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Answer:

113

Step-by-step explanation:

Total mass of waffles = 45 x 5 = 225 pounds

No. of people needed = 225 / 2 + 1 = 112 + 1 = 113

You need to add 1 because 112 people can only eat 224 pounds, so the last person eats only 1 pound

Answer:

113 people are necessary to eat all of the waffles.

Step-by-step explanation:

There are 5 stacks of huge waffles that each weigh 45 pounds.

Hence, Total amount of waffles=5×45 pounds

                                                   =225 pounds

A person can eat 2 pounds.

and 225/2=112.5

112 people can only eat 224 pounds, so the last person eats only 1 pound.

⇒ 113 people are necessary to eat all of the waffles.

Answer:

The distinct factors of 75 are 1, 3, 5, 15, 25, 75.

Step-by-step explanation:

Please mark brainliest and have a great day!

Answer:

6

Step-by-step explanation:

1,3,5,15,25,75

Answer:

[tex]\frac{1}{3}[/tex]

Step-by-step explanation:

Using the rule of logarithms

[tex]log_{b}[/tex] x = n ⇔ x = [tex]b^{n}[/tex]

let [tex]log_{125}[/tex] 5 = n, then

5 = [tex]125^{n}[/tex]

note that 125 = 5³ ⇒ [tex](5^3) ^{n}[/tex] = [tex]5^{3n}[/tex]

Since bases are equal ( both 5) equate the exponents

3n = 1 ( divide both sides by 3 )

n = [tex]\frac{1}{3}[/tex]

The value of the expression log₁₂₅5 is 1/3.

The correct option is A.

The inverse of exponentiation is the logarithm. This indicates that the exponent to which b must be raised in order to obtain a number x is the logarithm of x to the base b.

Given:

A logarithmic expression,

let log₁₂₅5 = x

Then simplifying,

5 = (125)ˣ

That means,

x = 1/3

Therefore, x = 1/3.

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Answer:

Sometimes

Step-by-step explanation:

Note that the word "collinear" means lying on the same line.

The three points can be on the same line, but not always. For example, the three points can form a triangle, a square-u, etc.

~

Answer:

sometimes

Step-by-step explanation:

Three points are sometimes collinear

There are infinite points on a line, so they can be collinear.

But 3 points make a triangle, so they are not on a line, so they are not collinear.

Answer:

The graph in the attached figure

Step-by-step explanation:

we have

[tex]y\geq (x-4)^{2}[/tex]

The solution is the shaded area above the vertical parabola

using a graphing tool

see the attached figure

Substitute the numbers for xy

(6)(3)

= 18

Answer is 18

The expression xy for x = 6 and y = 3 is 18.

We have to evaluate, the expression xy for x = 6 and y = 3.

According to the question,

To find the expression xy calculation must be done in a single unit following all the steps given below.

The value of x = 6 and y = 3,

Then,

The multiplication of xy is,

[tex]= x\times y \\\\= 6 \times 3\\\\= 18[/tex]

Hence, The expression xy for x = 6 and y = 3 is 18.

To know more about the Expression click the link given below.

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Answer:

x = 7

Step-by-step explanation:

recognize that this is a right triangle with one of the  internal angles = 45°. This means that the other angle not shown is 180 - 90 - 45 = 45°

This makes the triangle an isosceles triangle.

If so, x must be the same length as the other side adjacent to 90°

i.e x = 7

Answer:

The correct answer option is [tex]\frac{25}{9}[/tex].

Step-by-step explanation:

We are given the following expression and we are to evaluate it when [tex]a = 5[/tex] and [tex]k = -2[/tex]:

[tex][\frac{3^2a^{-2}}{3a^{-1}} ]^k[/tex]

Substituting the given values of  [tex] a [/tex] and [tex] k [/tex] to get:

[tex][\frac{3^2(5)^{-2}}{3(5)^{-1}} ]^{-2}[/tex]

[tex]\frac{3^{(2\times -2)}.5^{(1\times-2)}}{3^{(-1\times-2)}.5^{(2\times-2)}}[/tex]

[tex]\frac{3^{-4}.5^{-2}}{3^{-2}.5^{-4}}[/tex]

[tex]3^{-2}.5^2[/tex]

[tex] \frac { 1 } { 3 ^ 2 } . 2 [/tex]

[tex] \frac { 1 } { 9 } . 2 5 [/tex]

[tex] \frac { 2 5 } { 9 } [/tex]

Considering that there is no real question content here, we can't be for sure, so I am just going to say 100% probability since it seems like that is the only card he can pick from ; ~ ;

Answer:

6a^4-2a

Step-by-step explanation:

First step: Distributive Property -2a^4-2a+8a^4

Second step: Combine like terms 6a^4-2a

Step-by-step explanation:

You use PEMDAS parenthesis, exponents, multiplication, addition, subtraction.

First you will change the -(-3) into positive

-55+-7x6+3x4

Now change the +-7 into negative 7

-55-7x6+3x4

Now multiply 7 times 6...

-55-42+3x4

Now multiply 3 times 4...

-55-42+12

Now add the two negatives, 55 and 42

-97+12

Now add those...

-85

Answer:

C. x = 5, y = 2

Step-by-step explanation:

Simply plug in each given term in the answer choices, evaluate, then find out which two will make the system of equations authentic, or genuine.

Answer:

c. 20%

Step-by-step explanation:

60 is 20% of 300

The answer to the question is 25%

The percent of profit can be calculated by using the formula:

Profit Percentage = (Profit / Cost Price) x 100%

Given that Cindy made a profit of $60 by selling her camera for $300, her profit percentage would be:

Profit Percentage = (60 / 240) x 100% = 25%

Answer:

Answer is =2x^3+3x^2-11x-6

Step-by-step explanation:

First of all multiply first and second bracket.

=x(2x+1) -2(2x+1)

=2x^2+x-4x-2

=2x^2-3x-2

Now multiply 2x^2-3x-2 with (x+3)

=x(2x^2-3x-2) +3(2x^2-3x-2)

=2x^3-3x^2-2x+6x^2-9x-6

=2x^3+3x^2-11x-6

The expansion and simplification of the expression (2x + 1)(x - 2)(x + 3) is 2x^3 + 3x^2 - 11x - 6.

To expand and simplify the expression (2x + 1)(x - 2)(x + 3), we use the distributive property (a(b + c) = ab + ac) to distribute each term of one binomial with each term of the others.

We start by expanding the first two brackets : (2x + 1)(x - 2). This gives 2x^2 - 4x + x - 2 or, 2x^2 - 3x - 2.

Now, we expand the above result with (x + 3): (2x^2 - 3x - 2)(x + 3) yielding 2x^3 - 3x^2 - 2x + 6x^2 - 9x - 6.

When we simplify that, we get : 2x^3 + 3x^2 - 11x - 6. So, the expansion and simplification is : (2x + 1)(x - 2)(x + 3) = 2x^3 + 3x^2 - 11x - 6.

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Answer:

[tex]x=2- 3\sqrt{2}[/tex] or [tex]x=2+3\sqrt{2}[/tex]

Step-by-step explanation:

We want to solve for x in the equation;

[tex](x-2)^2-18=0[/tex]

Add 18 to both sides

[tex](x-2)^2=18[/tex]

We solve by the square root method.

[tex]x-2=\pm \sqrt{18}[/tex]

[tex]x-2=\pm 3\sqrt{2}[/tex]

Add 2 to both sides

[tex]x=2\pm 3\sqrt{2}[/tex]

Split the plus or minus sign.

[tex]x=2- 3\sqrt{2}[/tex] or [tex]x=2+3\sqrt{2}[/tex]

Therefore the exact solution is [tex]x=2- 3\sqrt{2}[/tex] or [tex]x=2+3\sqrt{2}[/tex]

Answer:

[tex]\large\boxed{\{-7,\ 1\}}[/tex]

Step-by-step explanation:

[tex]x^2+6x=7\\\\x^2+2(x)(3)=7\qquad\text{add}\ 3^2=9\ \text{to both sides}\\\\x^2+2(x)(3)+3^2=7+9\qquad\text{use}\ (a+b)^2=a^2+2ab+b^2\\\\(x+3)^2=16\Rightarrow x+3=\pm\sqrt{16}\\\\x+3=-4\ \vee\ x+3=4\qquad\text{subtract 3 from both sides}\\\\x=-7\ \vee\ x=1[/tex]

Answer:

A = (3,-2)  

reflect along the y -axis ; set x=-x  

(-3,-2)  

reflect along the x-axis ; set y=-y  

A' = (-3,2)  

Same for B,C and D  

ABCD is reflected across the y-axis and then the x-axis.

Step-by-step explanation:

Answer:

A )rotate 90 degrees counterclockwise,then shift 2 units up.

Step-by-step explanation:

Given  : graph .

To find : what transformation were applied to ABC to obtain A’B’C.

Solution : We have given graph

Parent ABC triangle with coordinates A(2 ,2) ; B (5 ,6) ; C ( 8 , 2).

Transformed triangle with coordinates  A' (-2 ,4) ; B' (-6 ,7) ; C' ( -2 ,15).

By the rotational of 90° counter clockwise : (x ,y) →→ ( -y , x ).

And it is shifted by 2 unit up

(x ,y) →→ ( -y , x + 2 ).

A(2 ,2) →→ A' (-2 ,4)

B (5 ,6) →→ B' (-6 ,7)

C ( 8 , 2) →→ C' ( -2 ,15).

Therefore, A )rotate 90 degrees counterclockwise,then shift 2 units up.

Answer:

Last Option

Step-by-step explanation:

Given expression is:

[tex]\sqrt[4]{\frac{24x^6y}{128x^4y^5}}[/tex]

Simplifying the radicand

[tex]=\sqrt[4]{\frac{8*3*x^6*y}{8*16*x^4*y^5}}\\=\sqrt[4]{\frac{3*x^6*y}{16*x^4*y^5}}\\=\sqrt[4]{\frac{3*x^6*y}{2^4*x^4*y^5}}\\=\sqrt[4]{\frac{3*x^{(6-4)}}{2^4*y^{(5-1)}}}\\=\sqrt[4]{\frac{3*x^{2}}{2^4*y^{4}}}\\Applying\ Radical\\= \frac{\sqrt[4]{3x^2}}{2y}[/tex]

Hence,

Last option is correct ..

Answer:

[tex]330,\frac{5\pi }{3},\frac{7\pi }{6}, \frac{2\pi }{3} ,\frac{\pi }{2}[/tex]

Step-by-step explanation:

We have to find the alternate angles regarding π

So,

[tex]\frac{\pi }{2} = 90 \\330\\\frac{5\pi }{3} = 300\\\frac{7\pi }{6} = 210\\\frac{2\pi }{3} = 120[/tex]

As we have all the angles in number form, we can sort them in descending order to get the answer

330, 300, 210, 120, 90

Writing using pi form

[tex]330,\frac{5\pi }{3},\frac{7\pi }{6}, \frac{2\pi }{3} ,\frac{\pi }{2}[/tex]

Hence, Option D is correct ..

Answer:

D) 330, [tex]\frac{5\pi }{3}[/tex], [tex]\frac{7\pi }{6}[/tex], [tex]\frac{2\pi }{3}[/tex], [tex]\frac{\pi }{2}[/tex]

Step-by-step explanation:

To find the order from greatest to least, we need to convert all [tex]\pi[/tex] terms to degrees.

We know that π = 180°

[tex]\frac{\pi }{2} = \frac{180}{2} = 90[/tex]

[tex]\frac{5\pi }{3} = \frac{5*180}{3} = \frac{900}{3} = 300[/tex]

[tex]\frac{7\pi }{6} = \frac{7*180}{6} = \frac{1260}{6} = 210[/tex]

[tex]\frac{2\pi }{3} = \frac{2*180}{3} = \frac{360}{3} = 120[/tex]

Now we have converted all in degrees. Let's arrange them from greatest to least.

330, 300, 210, 120, 90

Let's write them using [tex]\pi[/tex] term.

330, [tex]\frac{5\pi }{3}[/tex], [tex]\frac{7\pi }{6}[/tex], [tex]\frac{2\pi }{3}[/tex], [tex]\frac{\pi }{2}[/tex]

Therefore, the answer is D) 330, [tex]\frac{5\pi }{3}[/tex], [tex]\frac{7\pi }{6}[/tex], [tex]\frac{2\pi }{3}[/tex], [tex]\frac{\pi }{2}[/tex]

Answer:

(2, -7).

Step-by-step explanation:

The center is the midpoint of the diameter.

This is  (5 + -1) / 2 ,  (-6+(-8)/2)

= (4/2, -14/2)

= (2, -7).

Answer: The center is (2,-7)

Step-by-step explanation:

In this case the center of this circle is the midpoint of its diameter. Then you need to use this formula:

[tex]Midpoint=Center=(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})[/tex]

Knowing that this circle has a diameter whose endpoints are (5, -6) and (-1, -8), you can identify that:

[tex]x_1=5\\x_2=-1\\y_1=-6\\y_2=-8[/tex]

Then you can substitute these coordinates into [tex]Center=(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})[/tex], getting:

[tex]Center=(\frac{5+(-1)}{2},\frac{-6+(-8)}{2})[/tex]

[tex]Center=(\frac{5-1}{2},\frac{-6-8}{2})[/tex]

[tex]Center=(2,-7)[/tex]

Answer:

The solution is:

Step-by-step explanation:

We have the following equation

[tex]-4(2x+3)=2x+6-(8x+2)[/tex]

To solve the equation apply the distributive property

[tex]-4(2x+3)=2x+6-(8x+2)[/tex]

[tex]-4*2x+3(-4)=2x+6-(1)*8x+2*(-1)[/tex]

Now simplify the expression

[tex]-8x-12=2x+6-8x-2[/tex]

[tex]-8x-12=-6x+4[/tex]

Add 6x +12 on both sides of the equation

[tex]-8x-12+6x+12=-6x+4+6x+12[/tex]

[tex]-2x=4+12[/tex]

[tex]-2x=16[/tex]

Divide both sides of the equality between -2

[tex]\frac{-2}{2}x=\frac{16}{-2}[/tex]

Answer:

Step-by-step explanation:

5 * 5 * 5 * 5 * 5 = 5^5

Written in Latex, which is the best way to show this, the answer is

[tex]5^{5}[/tex]

I think you might mean B. If you do then it is correct, but it must be shown as 5^5

Answer:

x<8

Step-by-step explanation:

We have one equation and one inequation:

8=x+y                      [1]

y>0                          [2]

Solving [1] for 'y' we have:

8=x+y → y = 8-x

If y>0, then 'x' must be less than 0. Given that if 'x' is equal or greater than 8, 'y' will take negative values.

Then: x<8

Answer:

I know this is way late but its(11)

Step-by-step explanation:

Answer:

11

Step-by-step explanation:

Answer:

28°

Step-by-step explanation:

Hello!

The measurement (not mesrement) of k is 28°, because the shown 28° angle and angle k are "vertical angles" and thus are equal.

Answer: Option C

[tex]y=5[/tex], [tex]x=10[/tex]

Step-by-step explanation:

If the lines m and n are parallel then the large triangle and the small triangle are similar triangles, because they have equal angles.

By definition for similar triangles it is satisfied that if they have sides of length a, b, c and a ', b' and c 'then:

[tex]\frac{a}{a'}=\frac{b}{b'} =\frac{c}{c'}[/tex]

In this case

[tex]a = 12\\a' = 4\\c = 15\\c' = y[/tex]

So:

[tex]\frac{12}{4}=\frac{15}{y}[/tex]

[tex]3=\frac{15}{y}[/tex]

[tex]y=\frac{15}{3}[/tex]

[tex]y=5[/tex]

Therefore

if [tex]x+y=15[/tex] and [tex]y=5[/tex] then [tex]x =10[/tex]

Finally

[tex]y=5[/tex], [tex]x=10[/tex]