Mathematics Middle School

Erica had 6 coins in her coin collection. she goes to a coin show and buys some coins. how many dose she have now?

Answers

Answer 1
i think erica has 7 coins in her coin collection.

Related Questions

what does it mean to solve the system of equation?

Answers

Solving a system of equations usually means that you solve for a variable in a specific equation. Systems of equations consist of 2+ equations that contain the same variables.

Ex :

2x + 2y = 8
3x + 3y = 9

Then, using those equations, you solve for x & y

~Hope I helped!~

Does Anyone know how many time can 4 go into 0

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4 can go into 0 0 times
The answer is zero. You can't divide 0 by anything

−100%+0.58
plzz help

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-100% is the same as -100/100
so, -100/100+0.58 = -1+0.58 = -0.42

How do I solve this equation?
6 - 0.25f = f - 3

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f=7.2 because first you add .25f to both side. Then it became 6=1.25f-3 then you add 3 from both side 9=1.25f then you divide 1.25 by both side so f=7.2

Maia's calculator displays a number as 9.125e10. What is this number in standard form?

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I'm going to assume that it's 9125 x 10^7 (sorry if it's not correct)

or it's 9.125 x 10.
Sorry I do not understand how to do this

PLEASE ANSWER IF YOU CAN!
The table shows the lowest temperatures of several cities.
(a) Plot and label the temperature of each city on a vertical number line.
(b) Calculate the temperature difference between each pair of cities. Organize your results in a table.

Answers

Part A you will have to draw.
Part B:
Smithon to Hedgeborough: 2.5
Smithon to East Bunting: 3
Hedgeborough to East Bunting: -0.6

angle P and angle Q are supplementary. If angle P = 2x and angle Q = x-3, find X

Answers

2x+x-3=180
3x-3=180
3x=183
x=61

The angles P and Q are supplementary, meaning together they add up to 180 degrees. Based on the given expressions for these angles, solving for x yields x equals 61.

The given problem describes supplementary angles P and Q. Supplementary angles are two angles whose measures add up to 180 degrees. In this case, angle P is represented by 2x and angle Q is represented by x-3. The equation representing these supplementary angles is therefore 2x + (x - 3) = 180.

Combining similar terms, this equation simplifies to 3x - 3 = 180. To solve for x, add 3 to both sides obtaining 3x = 183. Finally, divide each side by 3 to find x = 61.

Learn more about Supplementary Angles here:

https://brainly.com/question/18164299

#SPJ2

Dominique used the inequality below to find the maximum number of sweatshirts she could purchase with her savings.

32 x < 300

What is the greatest number of sweatshirts Dominique can purchase?

Answers

We just have to find the closest number that can be multiplied by 32 and still be under 300. Do this by following this step:

Divide by 32 on both sides.

x < 9.375

We can't buy 9.375 sweatshirts though, and we can't add more decimals or it will go over 300, so you round down to 9.

Dominique can buy 9 sweatshirts without going over $300!

what is 25%of $80
[tex]1 \div 25 \times 80[/tex]

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25% of 80 = 0.25 * 80 = 20

1/25 * 80 = 1/25 * 80/1 = 80/25 = 3.2

Prove that triangle ABC must be isosceles

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First let us determine what <ABD is: 180º- 90º - 2nº = 90-2nº (the square represents a 90º angle

Then find <DCB: 180º - 90º - nº = 90-nº

Angle <ACB doesn't change: it is 90-n

but, <ABD is only part of <ABC: if we add <ABD with <DBC then we get 90-2n+n = 90-n

Definition of an isoceles triangle: It has two sides that are congruent or has two angles that are congruent.

Because both <ABC and <ACB equal 90-n the triangle ABC is an isoceles triangle.


Hope this Helps, and May the Force Be With You!

-Jabba

I need help with these 2 questions. I will give BRAINLIEST!!!
Number 1
TJ, Max, and Misha are all the same age. The sum of their ages is s years. How old was TJ eight years ago?

Number 2
Alex is 3 times as old as he was 2 years ago. How old is he now?
Thanks!!!!!

Answers

Alex is 15 for number 2 


I cannot find the answer for number 1 it isn't ringing a. bell

There are 9 book on the shelf. 9 are blue and the rest are green. How many books are green?

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If there are a total of 9 books on a shelf and 9 are blue then that means none of them are green. 9-9=0
The answer is 0 nine minus nine is 0

Explain how to model 3 groups of 6.

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lets say groups = g

3 groups of 6 is 

3(g) =6

3g/3  = 6/3

g = 2

there are 2 in each group

hope this helps

y - 5 = 0.5x2 + 6x - 3 How many x-intercepts does this have?
 update!!! the answer is 2

Answers

The answer is actually 2 because you have 0.5x (I think that's what it's supposed to be) and 6x.
y = 0.5x^2 + 6x + 2      (adding 5 to both sides of the original equation)

Discriminant  b^2 - 4ac  =  6^2 - 4 * 0.5 * 2  =   36 -  4  = 32

The discriminant is positive and not a perfect square so the equation has 2 x intercepts.

What is
1.5 repeated as a fraction

Answers

1 and 1/2 is the answer 

.5 = 1/2

 so 1.5 would be 1 1/2 as a fraction

if h(x)=3^x-7 find h(4) show all work
[tex]h(x) = {3}^{x} - 7[/tex]

Answers

Just substitute 4 for x in the given equation:

h(4) = 3^4 - 7 = 81 - 7 = 74 (answer)
h(x) = (3^x) - 7
h(4) = (3^4) - 7 ... replace every x with 4; then use PEMDAS to simplify
h(4) = 81 - 7 
h(4) = 74

Answer: 74

Side Note: 3^4 means we have four copies of '3' being multiplied together
3^4 = 3*3*3*3 = 9*9 = 81

explain how multiplying playing with 6 is like multiplying with 3

Answers

6 is only the double of 3
3×2=6

Any number that's multiplied by 6 will be the double of any number multiplied by 3, or vice versa, any number multiplied by 3 will be half of any number multiplied by 6. This is because 6 is a multiple of 3.

Take for example:
850×6=5100 ⇔ 850×(3×2)=5100

Convert: y>3/2x-7/2 from point slope to standard form?

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The goal is to get the inequality into the form Ax+By > C or Ax+By < C

First multiply both sides of the inequality by 2 to clear out the fractions
y > (3/2)x - 7/2
2*y > 2*( (3/2)x - 7/2 )
2y > 2*( (3/2)x ) + 2*( -7/2 )
2y > 3x - 7

Now get the x and y terms to one side; move the 7 to its own side
2y > 3x - 7
2y+7 > 3x - 7+7 ... add 7 to both sides
2y+7 > 3x
2y+7-2y > 3x-2y ... subtract 2y from both sides
7 > 3x-2y
3x-2y < 7 ... flip the two sides and the inequality sign

We finally have the inequality into the form Ax+By < C where 
A = 3
B = -2
C = 7

---------------------------------------------

The answer is 3x-2y < 7

HELP!!! ASAP
how would i write this into a conditional statement
3x-7=14 implies that 3x=21

Answers

If 3x-7=14, then 3x=21
Conditional Statements always have if-then
Hey, here is my genius answer for today, it's what the other person wrote. LOL, i'm back on right now, but yes, the other person is right, conditional statements always have if and then.

Dolores bought 15 party hats priced at $0.75 each and 15 noisemakers priced at $1.25 each. How much did Dolores spend in all?

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she spends 30 dollars

the answer is 30$!! 


i hope this helps and have a wonderful day!

List all the possible ways to write life.

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In life nothing is impossible
no solution for this

write a linear equation that is parallel to 12x+3y=24 and passes through the point (-2,7)

Answers

In order to write the formula for another line which is parallel, we need the slope (m). Parallel lines never in fact touch or intersect at any one point. They are either the same lines, occupying the same points, or different parallel lines, never occupying the same points, but sharing the same slope (m).
If we put out equation in slope-intercept format: y = mx+b, we can obtain our needed m.
12x+3y=24 ->> 3y = -12x+24
3y/3 = (-12x+24)/3 ->> y = -4x+8, therefore our m = -4
Now we can use our info to make the line in point-slope format: y-y1 = m (x-x1)
So, y-7 = -4 (x--2) or y-7 = -4 (x+2)
You can leave it like that or convert it:
y-7 = -4x -8 ->> y = -4x -8+7 ->> y = -4x-1
or even in this format: 4x+y=-1

In a bicycle race, Rhonda’s time was 3.8 min. faster than Stephanie’s time. If t represents Rhonda’s time, which equation is true?
A.
41.2 + 3.8 = t


B.
41.2 – 3.8 = t


C.
3.8 t = 12


D.
3.8 t = 41.2

Answers

SO all you have to do here is add 3.8 to Stephanie's time to get t. By realizing this we can immediately cross out B. C. and D.    B. is subtraction.    C. is  multiplication and D. is multiplication.    Therefore A. is your answer


Hope I helped



Brainliest if satisfied :D

Walter is mixing cement for his new patio. He knows he needs to water-to-cement ratio of 20-30. What percent of his total mixture is water?

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The ratio of water to cement is 20:30 meaning that for every 20 parts of water, we have 30 parts of cement. There are 20+30 = 50 parts total.

Divide the number of parts of water (20) over the total number of parts (50)
20/50 = 2/5 = 0.40
use a calculator or long division to find the decimal form of 2/5 to be 0.40

Then move the decimal point 2 spots to the right to go from 0.40 to 40%

Answer: the percent of water in the mix is 40%

Final answer:

To find the percentage of water in Walter's mixture with a water-to-cement ratio of 20-30, the water part is 20 out of 50 total parts, which equates to 40% of the mixture being water.

Explanation:

Walter needs a water-to-cement ratio of 20-30 for his patio cement mixture. To find out what percent of his total mixture is water, we can interpret the ratio as a fraction and then convert that fraction to a percentage. The fraction for water is 20 parts out of a total of 20 (water) + 30 (cement) parts, which is 20/50. To convert this to a percentage, we multiply by 100%.

Calculating the percentage: (20/50) × 100% = 40%

Therefore, 40% of Walter's total mixture is water.

Plz send help ???????????????????????

Answers

You have 18.6.
You need to find the smallest number that would round up to 18.6.
It is 18.55
Since the last digit is the hundredths place is a 5, to round to the nearest tenth, you drop the last 5 and the first five becomes 6 giving you 18.6.
Answer: 18.55

The most efficient first step in the process to factor the trinomial 3x3-24x2+36 is

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you have to do the multiplication step, if there are any numbers being multiplied

B. Factor out 3x. on apex quite simple

Marco and Drew stacked boxes on a shelf. Marco lifted 9 boxes and Drew lifted 14 boxes. The boxes that Drew lifted each weighed 8 lb less than the boxes Marco lifted. Let m represent the weight of the boxes that Marco lifted.Which expression represents the total number of pounds Drew lifted?14(m−8)112m9(m+8)m−8

Answers

We let m be the weight of the boxes Marco lifted. From the problem statement, each box that Drew lifted is eight pounds less than Marco's boxes. It can be represented by (m-8). To find for the total number of pounds Drew lifted, we multiply the expression above by the number of boxes he lifted which is 14. Therefore, the correct answer is option B, 14(m-8).

if m = weight of boxes and the boxes drew lifted were 8 pound less you would have (m-8)

 Marco lifted 14 boxes so the equation would be 14(m-8)

Which doubles fact can help you solve 4+5

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By doing the addends of 4+5 :)

expand and simplify (x-3)(x+7)

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Let's multiply each term for the other one.

I mean: x*x; x+7; -3*x; -3*7

So x²+7x-3x-21

We add up like terms.

Final answer: x²+4x-21
x(x+7) -3(x+7)
x² + 7x -3x -21
x² +4x -21

that's the answer
if you understand and it's correct. don't forget to make my answer the brainliest

20 POINTS PLEASE HELP


Which story problem could be solved using the given equation? 1/4×3/5=m

Christie hiked 1/4 mile on the trail. Jackie hiked 3/5 mile farther than Christie. How far, in miles, did Jackie hike on the trail?

Shawn made a poster that has a width of 1/4 meter and a length of 3/5 meter. What is the perimeter, of Shawn’s poster?


There is 3/5 of a box of dog treats in the cupboard. Jill’s dog eats 1/4 of a box of treats in a week. How many weeks of treats are left in the box for Jill’s dog?


In Sophie’s doll collection, 3/5 of the dolls are in their original boxes. Sophie plans to donate 1/4 of the dolls in these boxes to charity. How much of her doll collection will Sophie donate to charity?

Answers

the answer is the bottom !hope this helps!
 
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