Please help, I'll mark Brainiest. It's 8th grade math

Answer:

a) 18

b)12

Step-by-step explanation:

hope this helps

Answer:

A

Step-by-step explanation:

Answer:

When you rub the balloon on your hair, the balloon becomes negatively charged because it gains electrons from your hair.

Step-by-step explanation:

Is it multiple choice? If not the answer is anything positively charged. Negative and positive ions attract, while synonymous (N,N or P,P) repel. Pieces of paper, the wall, or even your clothing are all possibly positive charged objects the balloon could stick to.

Answer:

hi, do you study physics too?

Answer:

2(x-3)(x-1)

Step-by-step explanation:

2(x+x+3)

2(x-3)(x-1)

Answer:

Step-by-step explanation:

Are you trying to factor the quadratic expression?

Use the Quadratic formula to find the roots.

x = [-1 ±√(1²-4∙2∙3)]/[2∙2] = -¼ ± ¼√(-23)

2x² +x+3 = 2(x+¼+ ¼√23i)(x+¼- ¼√23i)

Answer:

volume = 251.33

Step-by-step explanation:

volume = pi * r^2 * h/3

v= 22/7 * 4* 4 * 15/3

v= 251.33

Answer:

3.7

Step-by-step explanation:

each tick represents .1 unit

Answer:

i believe it's 6.76×10^2

Answer:

The surface area is 1.5cm

Step-by-step explanation:

6/4=1.5cm

Answer:

216 cm²

Step-by-step explanation:

A cube has 6 square faces.

The area of 1 face = 6 × 6 = 36 cm² , then

SA = 6 × 36 cm² = 216 cm²

Answer:

22

Step-by-step explanation:

Answer:

22.5

Step-by-step explanation:

Answer:

[tex]\fbox{\textsf{Option B is \underline{correct}.}}[/tex]

Step-by-step explanation:

[tex]\textsf{We are asked to identify what the radius of a circle is.}\\[/tex]

[tex]\textsf{Let's look at what a Radius really is.}}[/tex]

[tex]\Large\underline{\textsf{What is a Radius?}}[/tex]

[tex]\textsf{A \underline{Radius} is a \underline{line segment} that has the distance between the \underline{center of the circle}}[/tex]

[tex]\textsf{to a \underline{point} on the \underline{circumference}. A Radius is a \bf{straight line.}}[/tex]

[tex]\textsf{Let's review the options provided.}}[/tex]

[tex]\textsf{Option A is \underline{incorrect}. }}[/tex]

[tex]\textsf{Sometimes it won't cross the center if their endpoints are on the circumference.}[/tex]

[tex]\textsf{This is called a Diameter, if it does cross the center.}[/tex]

[tex]\fbox{\textsf{Option B is \underline{correct}.}}[/tex]

[tex]\textsf{The Radius is exactly a line segment from the center to the circumference.}[/tex]

[tex]\textsf{Option C is \underline{incorrect}. }}[/tex]

[tex]\textsf{A Chord is a line segment whose endpoints are on the circumference, always.}[/tex]

[tex]\textsf{This is not a Radius, as a Chord covers twice the distance, and length of a Radius.}[/tex]

[tex]\textsf{Option D is \underline{incorrect}. }}[/tex]

[tex]\textsf{This is incorrect. A Radius has to have the Center as one of its points. }[/tex]

Answer:

B (a + b)^1/2

Step-by-step explanation:

[tex]\sqrt[m]{x^n} =a^{n/m}[/tex]

Is the formula for radical to exponent notation.

Answer:

C

Step-by-step explanation:

I think that this is talking about which sides match up with each other and if that is the case the answer would be C

Answer:

Step-by-step explanation:

3*3 + 1/2*3*3 = 9+4.5 = 13.5

Answer: Cindy

Step-by-step explanation:

42/3.5=12 minutes per mile

So Cindy ran faster at 11 minutes per mile

Answer:

Cindy was faster

Step-by-step explanation:

jasmine

42/3.5= 12 miles por hour

Answer:

vertical

Vertically opposite angles make a up a 360 degree angle

Answer:

b) Vertical

Step-by-step explanation:

When two lines intersect, 4 angles are formed. Two non-adjacent angles with no common inside points are called vertical angles.

Answer: b) Vertical

515151÷333 = 1547

Thanks.....

Answer:

Step-by-step explanation:

It was on khan :)

Answer:

The answer would be 1/6

Step-by-step explanation:

That is because 1/3 divided by 2 equals 6. Hope this helps.

Answer:

400 + 100

200 + 300

100 + 100+ 100 + 100 + 100

Answer:

D. 187 m²

Step-by-step explanation:

Alrighty, so this is a standard area problem, the formula for finding the area of a triangle is base x height ÷ 2  so:

34 x 11 ÷ 2 = 187

So the area of the triangle is 187 m²

hope this helps:)

Answer:

Tip -$2.70

Total -$20.70

Step-by-step explanation:

Answer:

She will earn 485.13075 in interest.

Step-by-step explanation:

Assuming the interest rate is monthly and it is simple interest, the equation is Total = amount * (1 + rate) * time

Fill that out and solve the equation

T = 2500 * (1.03) * 6

T = 2500 * (1.1940523)

T = 2985.13075

To find the interest subtract T by 2500

2985.13075 - 2500 = 485.13075

Answer:

1170≥6x+750      x=70

Step-by-step explanation:

We can put these numbers into a slope equation, y=mx+b, the fixed weekly expense ($750) represents b. And the $6 per animal is the slope or m. So our equation become y=6x+750. Now the weekly expense is $1170 and will represent the y in the equaion, 1170=6x+750. First subract 750 from both sides, 420=6x, divide by 6 and get that there was 70 animals in the shelter that week.

The number of animals the shelter needs to house in order for expenses to be at least $1170 per week is calculated as 1170≥6x+750 x=70

In mathematics, an inequality is a link that compares two numbers or other mathematical expressions unfairly. Size comparisons between two numbers are commonly made on the number line.

In mathematics, "inequality" refers to a relationship between two expressions or values that is not equal to one another.

These figures can be entered into the slope equation y=mx+b, where the fixed weekly expense ($750) stands in for b. Additionally, the slope or m costs $6 per animal. We now have the equation y=6x+750. The current weekly expense of $1170 will serve as the y-coordinate in the equation, 1170=6x+750. First, divide 750 from both sides by 420 to obtain 6x, then divide that result by 6 to get the number of animals in the shelter that week 70.

To learn more about  Inequality refer to:

https://brainly.com/question/25275758

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the answer is 3 because you subtract 6 - 3 = 3r

Answer:

all if you don't answer them

Answer:

3 hours

160 - 55 = 105

105 ÷ 35 = 3

Answer:

3 hours

Step-by-step explanation:

First, we must turn this into an equation:

35n + 55 = 160

N = number of hours

Next, solve:

35n + 55 - 55 = 160 - 55

35n = 105

n = 3

The plumber was there for 3 hours.

Answer:

180/250

Step-by-step explanation: