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## Related questions in Mathematics

### Someone please help me with this math problem! :(

Now is easy to see that 2ax^2 must be equal to 8x^2 so 2a=8 you solve for a and you get a=4. The same step for b you have 10x+3ax= bx so 10+3a=b as you know now a is 4 so 10+12=b you solve for b and you get b=22.

The answer is a=4 and b=22

### How to solve this math question

2x - 1 + x + 4 = 12

3x + 3 = 12

3x = 12 - 3

3x = 9

x = 3

:)

### Grade 7 Math Can anyone help me work out these math questions? Show your work if you will. Solve this equation : 25 - 4 ^ 2 (power) divided by 8 (That is 25 subtract 4 to the second power divided by 8 ) Solve this math equation : 12 X 5 - 8/4 + 7 x 2 (That is 12 multiplied by 5 subtract the fraction 8 over 4 add 7 multiply by 2 )

4^2= 16

16/8= 2

25-2=23

The answer to the first question is

**23**.

12*5-8/4+7*2=

12*5= 60

8/4= 2

7*2= 14

60-2+14= 72

The answer to the second question is

**72**.

Number one is

**23.**

Number two is

**72.**

### Can you help with 5 math multiple question their easy

2. 2 3 4 5 9 10

3. 3 5 9

4. 300 and 400 because 100 x 3 is 300 and 4 x 100 is 400

5. 9000 and 5000 because 9 x 1000 is 9000 and 5 x 1000 is 5000

### A fossilized leaf contains 15% of its normal amount of carbon 14. How old is the fossil (to the nearest year)? Use 5600 years as the half-life of carbon 14. Solve the problem. A. 35,828 B. 15,299 C. 1311 D. 21,839

**Answer:**

Option B - 15299

**Step-by-step explanation:**

**Given :** A fossilized leaf contains 15% of its normal amount of carbon 14. Use 5600 years as the half-life of carbon 14.

**To find :** How old is the fossil (to the nearest year)?

**Solution : **

Let the normal or initial amount of carbon be A,

**According to the question,**

**An exponential function form**

**Where, **a is the initial i.e, a=A

A fossilized leaf contains 15% of its normal amount of carbon 14.

So, f(t)=15% of A

i.e,

b is half-life of Carbon-14 b=0.5

and t is the time span or age of the fossil in years.

**Substitute all the values in the formula,**

**Taking log both side,**

**For 5600 years the age of the fossil is **

**Therefore, Approximately Option B is correct.**

**The fossils are 15299 years old.**

### Who can I pay to do my Math Homework? Its 12th grade math and I also need help with my english. Inbox me if you can assist. Thanks!

### A dog owner is told by the veterinarian that his dog, Max, is overweight and needs to lose 4 to 5 pounds in order to live a healthy life. The dog weighs 126 pounds when he is put on a special diet to aid in the weight loss. The vet predicts that the diet will allow Max to lose 4 ounces per week. Max is brought to the vet every 2 weeks for a weight check. Write an equation to represent the doctor's prediction, and the relationship between Max's weight in pounds, y, and the number of times Max's weight is checked, x, in periods of two weeks. Reduce all answers to the nearest tenth of a number.

16 weeks minimum to lose 4lbs by 16 oz to one lbm

### What does a plus over a minus sign mean? I'm a science student and am doing some data analysis for one of my reports. Am not great on maths and don't know what a plus sign with a minus sign under it means. Can anyone help? Thankyou (am doing mean volume and standard deviation calculations - don't know if it makes a difference)

### Spectroscopy measurements may be made in either percent transmittance (% t) or absorbance ( a. based on the mathematical relationship between absorbance and transmittance, a= -log t, explain why calibration curves of absorbance versus concentration may deviate from a straight line when a<0.1 and when a>1.

### Explain how you could use the distributive property and mental math to find 5×198

### How to be best in math?

Means you have to practice, practice and practice.

Practice makes a man perfect.

### Dante took three tests on friday he got 92% on his english test an 88% on his math test, and a 90% on his science test write each percent as a decimal from least to greatest

### I'm having trouble with graphs and tables and equations.. I'm in math 1 and need help filling out the table (y=3x-1) I have to graph it after and I really need help getting the y output

Let's say we want to find when x=5. Then y would be y=3(5)-1 which would be 14. Our next coordinate to graph would be (5,14)

Hope I helped!

### 1. $30;20% markup2. In math class there are 35 students. 2/5 of them have on a blue shirt. how many students don't have on a blue shirt?

2. 14 have blue shirt

21 don't have a blue shirt

### Jon's weight loss for each week of the month is 4lbs., 3.5 lbs. and 2 lbs. He gained 4.5 lbs. the last week. If Jon originally weighted 153 lbs., how much does he weigh now??? Plaz help I need the answer!! Be a life saver! Help

### What is the value of n in math

### A student scored an 88, 92, and 76 on three math tests. What does the student need to get on the fourth test to have an average of 85 for all four tests? James wants to use algebra to solve this problem. Which equation should he use?

**Answer: The student need to get 84 marks in the fourth test to have an average of 85 for all four tests**

**Step-by-step explanation:**

Since we have given that

**Scores of a student were **

88, 92, 76 on three math tests.

Since we want an average of 85 for all four tests.

Let the score he get on fourth test of Math be x.

As we know the formula for **" Average"** :

**Hence, The student need to get 84 marks in the fourth test to have an average of 85 for all four tests**.

### 15. wRITE Math write the definitions of the Identity Property of Addition and the Property of Addition. Use the addition table to provide examples of each.

### Find the product of 27x60 then explain how you would use mental math to find the product of 27x600

You would just have to add a 0 to 1,620

### 7th grade math!!! Help me!! And write these using the additive inverse!!

Answer:

Step-by-step explanation:

Go to Photomath! downloaded it cuz it will give you the answers. it’s good for whenever you need help

### F(x)=3x-11;f(0) what is the answer for this algebra 2 math problem

f = 3(0)-11

f = 0-11

f = -11

I hope this is helpful.

### Geometry classes today tend to treat axioms and postulates as synonyms; however, there were distinctions between these two ideas. What were the distinctions made by Greek mathematicians?

### Math problem -10 2/7 / -4 4/11

### In a recent math class 105 students took a test. 84 of the students passed the test. which fraction represents the ratio of students who passed the test to total students?

### In a math equation to you divide first or multiply

not saying the guy over me is wrong but this might help to