Which of the following are solutions to the equation below?
Check all that apply.
9x2 - 6x + 1 = 7

Answer and Step-by-step explanation:

Let us assume two boys are jogging.

Boy 1 jogging speed is 10 kilometres per hour

Boy 2 jogging speed is 20 kilometres per hour

This can be represented in terms of distance, d and time, t. When we do this, we have:

d = 10t boy 1

d = 20t boy 2

This implies that boy 1 rate of change is 10 kilometers for every one hour and boy 2 is 20 kilometers for every 1 hour.

From here, we can conclude that the rate of change of boy 2 is twice the rate of change of boy 1.

Answer:

c)30%

Step-by-step explanation:

Step one:

given data

The shopkeeper said each pair of earrings cost Rs. 12

if he offered 12 pairs for Rs. 100.

let us find the cost per pair

= 100/12

=Rs. 8.3 per pair

Required

The percent discount

Step two:

%percent discount= 12-8.3/12*100

%percent discount= 3.66/12*100

%percent discount= 0.305*100

%percent discount= 30.5%

Answer:

y = 3x

2y + 2x = 85

x = 10 5/8 y = 31 5/8

Step-by-step explanation:

Let’s say that y = length and x = width. We know that the length is 3 times the width (y = 3x) and the perimeter of the rectangle is 85 (2y + 2x = 85). To solve the system of equations, substitute y = 3x into the other equation. This results in the equation 2(3x) + 2x = 85. We now simplify the equation. 6x + 2x = 85 8x = 85 x = 10 5/8.

Now that we know x, we can substitute it into either equation to solve for y. y = 3(10 5/8) y = 31 5/8

The  system of equation which represent the given situation is 85 = 8x.

And the length and width of the rectangle is 36.86 and 10.62unit respectively.

Perimeter is the distance around the edge of a shape.

[tex]P = 2(l+w)[/tex]

where,

P is the perimeter of the rectangle

l is the length of the rectangle

w is the width of the rectangle.

According to the given question here:

We have,

The perimeter of the rectangle is 85 unit.

Let the width of the rectangle be x unit.

Then, the length of the rectangle be 3x.

Therefore, the equation which represent the situation is given by

85 = 2(x + 3x)

⇒85 = 2(4x)

⇒ 85 =8x

⇒ x = 85/8 = 10.62unit

⇒ 3x = 10.62 × 3 = 31.86 unit.

Hence, the length of the given rectangle is 31.86 unit and width is 10.62 unit .

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The image of the inscribed circle is missing so i have attached it.

Answer:

x = 35

None of the given options are correct.

Thus, Option D is the answer.

Step-by-step explanation:

From the attached image, we can see that there are two lines projecting out of the centre of the circle with one having it's endpoint touching the edge of the hexagon while the other is perpendicular to the centre of a side of the hexagon and labeled x has it's endpoint touching both the circumference and the hexagon side.

Since line labeled x projects from the centre of the circle to the circumference, we can say that the radius is x.

The triangle formed is a right angled triangle with the other part touching only the hexagon as the hypotenuse.

We see the remaining part between the circle and the hexagon of this hypotenuse line given as 2.

Thus, hypotenuse = x + 2

This is because from the centre to the circumference is x as earlier discussed and this hypotenuse line crosses the circumference of the circle before touching the edge of the hexagon.

Using pythagoras theorem, we can find x:

x² + 12² = (x + 2)²

x² + 144 = x² + 4x + 4

x² will cancel out to give;

4x + 4 = 144

4x = 144 - 4

4x = 140

x = 140/4

x = 35

Answer:

0.428x

Step-by-step explanation:

The price of a smart phone is "x" and is discounted 40% for a special promotion.

Step 1

The price after the discount is:

40% of x

= 40x/100

= 0.4x

Step 2

We calculate the exact amount the sales tax is.

You must also pay 7% sales tax on this purchase.

= 7% × 0.4x

= 7/100 × 0.4x

= 0.028x

Step 3

The final price for this purchase is calculated as:

0.4x + 0.028x

= 0.428x

Hence, the final price for this purchase is 0.428x

Answer:2

Step-by-step explanation:

The minimum value of C is 14 because the inequality x + 3y ≥ 14 has the minimum value is 14.

It is defined as the expression in mathematics in which both sides are not equal they have mathematical signs either less than or greater than, known as inequality.

We have:

C = x + 3y

Subject to constraints:

9x + 2y > 35

x + 3y ≥ 14

X ≥ 0

y ≥  0

As we can see in the inequality:

x + 3y ≥ 14

Compare with x + 3y = C

The minimum value of x + 3y is 14

Thus, the minimum value of C is 14 because the inequality x + 3y ≥ 14 has the minimum value is 14.

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Answer:

1. x=-9

2.x=13

Step-by-step explanation:

Answer:

B.

Step-by-step explanation:

The 6 has moved up because of addition instead of subtraction

Answer: [tex]8x^2-10x-6[/tex]

Step-by-step explanation:

Given : length =  [tex]3x^2-5x+1[/tex] , width = [tex]x^2-4[/tex]

Perimeter of rectangle  = 2 ( length + width)

Then,  Perimeter of given rectangle  = [tex]2 (3x^2-5x+1+x^2-4)[/tex]

[tex]=2 (4x^2-5x-3)\\\\= 8x^2-10x-6[/tex]

Hence, the  correct expression for perimeter = [tex]8x^2-10x-6[/tex]

Answer:

B

Step-by-step explanation:

If the charge for five cards was -15.95, the charge for one card is -3.19 because (-15.95)/5 = -3.19

Answer:

Solution in photo

Step-by-step explanation:

Answer:

1062882

Step-by-step explanation:

Seven digits numbers, with repetition of digits, having 6 or 9 at the last one's place :

The first six digits can be filled with 9 options each (numbers 1 to 9) , & the last digit can be filled with 2 options (number 6 & 9)

So, total 7 digit numbers as per given condition = 9 x 9 x 9 x 9 x 9 x 9 x 9 x 2 = 1062882

Answer:

D

Step-by-step explanation:

The correct diagram is D.

The diagram that   shows the correct setup for an electromagnet is Option D)

The correct setup of an electromagnet involves the following steps:

1. Obtain a ferromagnetic core, such as iron, steel, or a magnetic material.

2. Wrap an insulated wire around the ferromagnetic core, forming a coil.

3. Connect the ends of the wire to a power source, such as a battery or power supply.

4. When current flows through the wire, it creates a magnetic field, magnetizing the core and forming the electromagnet.

5. The strength of the electromagnet can be controlled by adjusting the current flowing through the wire.

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Answer:

A-0 B-4 C-5 D-3.5 E-6 F-4.5

Step-by-step explanation:

I followed the steps

Answer:

2, 2.5, 3, 3.5, 4, 4.5

Step-by-step explanation:

Answer:

I think it is C you should practice This is easy

Step-by-step explanation:

Answer:

z=-1

Step-by-step explanation:

8z+7=-15

8z=-15+7

z=-8/8

z=-1

Exact Form:

z = − 11/4

Decimal Form:

z == − 2.75

Mixed Number Form:

z = − 2  3/4

HOPES THIS HELPS YOU!!

PLEASE MARK MINE AS BRAINLIEST???

Answer:

B

Step-by-step explanation:

We can determine that it is sin, not cos, because the equation goes through the origin (0, 0).

The amplitude is 2 and since the amplitude is a for an equation in the form of asinx, the equation must have 2sinx.

Finally, the period is pi. The regular period of sinx is 2pi, so inside of the si, x must be multiplied by 2, which gets us to 2sin(2x).

I hope this helps! :)

Answer:

i think 48 is the correct answer

Answer:

you have to use the comment box brainly wont let you private message people

Step-by-step explanation:

lol U~U

Answer:

D. -17.5 Hope this helps. Pls give me brainliest :)

Answer:

Is there more of the problem i dont see the what y and x are equivalent to

Step-by-step explanation:

Answer:

ok

[tex]\pi = \frac{22}{7} or \: 3.142[/tex]

Step-by-step explanation:

[tex]c = 2\pi \: r \\ c = 2 \times \frac{22}{7} \times 15 \\ 94.28[/tex]

Answer:

C = 90 units²

Step-by-step explanation:

Since we are using 3 for π, simply substitute the information into the equation:

C = 2(3)(15)

C = 90 units²

Answer:

The percent increase should be 42%

Step-by-step explanation:

Subtract 131 from 92, you'll get 39

Divide, 39/92=423913....

Simply, I got 42%

Answer:

SHE ADDED THE COST OF THE HAIRCUT TO HER BALANCE.

Step-by-step explanation:

Instead of debited the cost of the haircut stephanie done the mistake by entering the charges of the hair cut into her balance. So due to this, the wrong entry should be recorded.

Therefore the above situation represents the situation in which she did the wrong

Hence, the same is to be considered

Answer:

h

Step-by-step explanation: