All categories

2 years ago

I WILL MARK BRAINLIEST

Mathematics

1 answer:

Reil [10]2 years ago

3 0

Answer:

Step-by-step explanation:

The students in social studies club is bias, the boys will probibly pick the easier one and the teachers will pick the one that causes less mess. but the only way to have a fair and random survey is to ask every student.

You might be interested in

Solve this equation for x: 2x^2 + 12x - 7 = 0

zhannawk [14.2K]

Answer:

x=0.5355 or x=-6.5355

First step is to: Isolate the constant term by adding 7 to both sides

Step-by-step explanation:

We want to solve this equation: $2x^2 + 12x - 7 = 0$

On observation, the trinomial is not factorizable so we use the Completing the square method.

Step 1: Isolate the constant term by adding 7 to both sides

$2x^2 + 12x - 7+7 = 0+7\\2x^2 + 12x=7$

Step 2: Divide the equation all through by the coefficient of $x^2$ which is 2.

$x^2 + 6x=\frac{7}{2}$

Step 3: Divide the coefficient of x by 2, square it and add it to both sides.

Coefficient of x=6

Divided by 2=3

Square of 3= $3^2$

Therefore, we have:

$x^2 + 6x+3^2=\frac{7}{2}+3^2$

Step 4: Write the Left Hand side in the form $(x+k)^2$

$(x+3)^2=\frac{7}{2}+3^2\\(x+3)^2=12.5\\$

Step 5: Take the square root of both sides and solve for x

$x+3=\pm\sqrt{12.5}\\x=-3\pm \sqrt{12.5}\\x=-3+ \sqrt{12.5}, $ or $x= -3- \sqrt{12.5}\\$x=0.5355 or x=-6.5355$

6 0

2 years ago

The figures are similar. Find x. The ratio of the perimeters is 7 : 10 how do I find x

Elena L [17]

7/10 = x/12 which mean you need to multiply each side by 12 to find x. So the answer would be X= 8.4

8 0

2 years ago

Help me with these problem as an area of a circle.

Jobisdone [24]

Area of circle = pi * r^2
pi * (3.25)^2 = 33.18307

Rounded = 33.18
Solution: area = 33.28 yd^2

6 0

2 years ago

Read 2 more answers

Jasmine works at the public library after school. She makes $7.00 per hour. She cannot work more than 15 hours per work. If y=7x

kotykmax [81]

Answer:

Step-by-step explanation:

Jasmine can work from 0 hours to 15 hours

6 0

2 years ago

Simplify: (–4) • (9) – (5) • (–2) <br> A)2 <br> B)–36 <br> C)–26 <br> D)82

lapo4ka [179]

Using the correct order of operations, your equation would simplify as:
-36 - 10 = -26

7 0

2 years ago