Help me solving those seven equation please 12x-9=8x-37 , 11x=8x-6, -x-29=13+2x ,2(4x+7)=2x-4 ,2x+15=43-5x ,-14+3(x+10)=7(2x+4)+x , and 8(x+3=12x-4
Answers
1. x = -7
2. x = -2
3. x = -14
4. x = -3
5. x = 4
6. x = -1
7. x = 7
Related Questions
A quality control officer randomly checking weights of pumpkin seed bags being filled by an automatic filling machine. Each bag is advertised as weighing 400 grams. A bag must weigh within 2.1 grams in order to be accepted. What is the range of rejected bag, x, for the bags of pumpkin seeds?
A. 397.9
B. x < 397.9 and x > 402.1
C. x < 400.0 and x> 402.1
D. 400.0 > x < 402.1
Answers
You calculate this by subtracting and adding 5.3 to 500
Option: B is the correct answer.
B. x < 397.9 and x > 402.1
Step-by-step explanation:It is given that:
Each bag is advertised as weighing 400 grams.
Also, a bag must weigh within 2.1 grams in order to be accepted.
Hence, for the bag being accepted the weight must be no less than 2.1 gram from 400 gram and should be no more than 2.1 gram from 400 grams.
i.e. the weight of the bag must be such that:
400-2.1≤ x ≤ 400+2.1
i.e.
397.9 ≤ x ≤ 402.1
Hence, if the weight of the bag is less than 397.9 grams or is more than 402.1 grams then the bag will be rejected.
i.e. The range for the bag being rejected is: x<397.9 grams and x>402.1 grams.
What best describes the expression y over 3?
A. 3 more than some number
B. Some number times 3
C. Some number divided by 3
D. 3 less than some number
Answers
A represents addition, y + 3
B represents multiplication, y * 3
D represents subtraction, y - 3
A motorboat covers the distance from one pier to the other pier in 4 hours and the way back in 5 hours. What is the speed of the boat in still water, if it covers 70 km with the current in 3.5 hours?
(its not 20 i tried)
Answers
r + c = speed with current
r - c = speed against current
3.5(r + c) = 70
r + c = 20
c = 20 - r
4(r + c) = distance from pier to pier
5(r - c) = distance from pier to pier
4(r + c) = 5(r - c)
4(r + 20 - r) = 5(r - 20 + r)
80 = 10r - 100
180 = 10r
18 = r
The speed in still water is 18 km/hour
Negative numbers do not need the negative sign (-) in front of them. True False
Answers
Answer: False.
Explanation: All negative number need the negative sign (-) in front of them because if there is no sign, than the negative number would turn out to be a positive number.
what number must you add to complete the square? x2-20x=17
A. 100
B. -10
C.-100
D. 10
Answers
Answer:
The number is 100
A is correct
Step-by-step explanation:
Given: [tex]x^2-20x=17[/tex]
We need to make completing square at left side.
Rule: We add a number " take half of the coefficient of x and then square it"
Coefficient of x = 20
Half of 20 = 10
Square of 10 = 100
So, we will add 100 both sides make completing square.
Now we make completing square to add 100
[tex]x^2-20x=17[/tex]
Add 100 both sides
[tex]x^2-20x+100=17+100[/tex]
Now we will factor left side perfect square
[tex]a^2-2ab+b^2=(a-b)^2[/tex]
[tex](x-10)^2=117[/tex]
[tex](x-10)^2[/tex] is completing square or perfect square.
Hence, The number is 100
Which system of equation can represent the equation?
Answers
The logarithmic property of base change given that
logx (b) = logc (b) / logc (x)
Therefore, the same property applies to this problem and the correct expression for this question is:
y1 = log (x + 3) / log 4
y2 = log (2 + x) / log2
Plzz help me
Match the system of the equation to the number of solutions.
y = 5
2x - 2/3y = 10
1. No solutions
2. One solution
3. Infinite solutions
Answers
They have different slopes and therefore must have one solution.
find the missing dimension. use the scale factor 5:8
Answers
5 : 8
1.5 : x
[tex]5x = 12 \\ x = 2.4[/tex]
Answer : Actual length = 2.4m
Question 15
5 : 8
x : 20
[tex]8x = 100 \\ x = 12.5[/tex]
Answer : Actual length = 12.5m
Hope this helps. - M
What best describes the expression y over 3?
A. 3 more than some number
B. Some number times 3
C. Some number divided by 3
D. 3 less than some number
Answers
Part a) Classify the figure
Part b) Name the vertices, edges, and bases
Answers
b) Vertices: A, B, C, D, E
• Edges: AE, BE, CE, DE, AB, BC, CD, AD
• Bases: ABCD
Which of the following is a statistical question?
A.
How much money is in Althea's pocket?
B.
How tall is the tallest building in the United States?
C.
What is the temperature in the refrigerator?
D.
What were the grades on the history final exam?
Answers
At Northwest Highschool, there are 1472 students in the junior class and 1012 students in the senior class. To let the juniors work with more experienced students, the teachers want to assign the students to committees with the same same number of juniors in each committee and the same number of seniors in each committee. (For example, there might be 2 juniors and 3 seniors in every committee). What is the largest number of committees that can be formed?
Answers
Please Help ASAP! Would be greatly appreciated.
Answers
The answer G represents -24/8 the best because it is dividing it into eight parts.
Hope this helps you.
Hi,
The answer G represents -24/8 the best because it is dividing it into eight parts.
Hope this helps you.
triangle ABC is similar to Triangle XYZ.
AB=9.7, BC=9.6, AC=15.1
YZ=118.8, Find XZ
triangle ABC is similar to Triangle XYZ.
AB=9.7, BC=9.6, AC=15.1
YZ=118.8, Find XZ
Answers
Since the triangles are similar, the ratio of their angles is the same. This means the ratio of BC to YZ will be the same as the ratio of AC to XZ; using this to set up a proportion,
9.6/118.8 = 15.1/x
Cross multiply:
9.6*x = 118.8(15.1)
9.6x = 1793.88
Divide both sides by 9.6:
9.6x/9.6 = 1793.88/9.6
x = 186.8625
The equation yˆ=0.09x+55.64 models a person's height, in inches, where x is the weight of the person in pounds. According to the regression equation, what is the approximate height of a person that weighs 160 pounds?
Answers
y = 0.09*160 + 55.64 <<--- replace x with 160
y = 14.4 + 55.64
y = 70.04
The person who weighs 160 pounds is predicted to be about 70.04 inches tall
Note: 70.04 inches = 5 ft, 10.04 inches (so roughly 5'10")
Answer:
Height is 70.04 inches.
Step-by-step explanation:
Given that the equation
[tex]yˆ=0.09x+55.64[/tex] models a person's height, in inches, where x is the weight of the person in pounds.
We have to find out the approximate height of the person that weighs 160 pounds
Algebraically we have to find y for x = 160
Substitute for y in the given equation.
[tex]y=0.09(160)+55.64\\y=70.04"[/tex]
Find an equivalent expression
Answers
Answer: 625
would be
Answer: 625
Solution:
To convert to standard form,(-5)^4 is equal to (-5)(-5)(-5)(-5)
Since the exponent is an even number, we can conclude that it will give the answer of a positive number. so if you multiply it all,it would give your the answer 625.
how to tell whether its a prime or composite number
Answers
2, 3, 5, 7, 11, 13, 17, 19, 23
Like this 1*2. Or 3*1
Composite numbers have more than two factors for example :
0, 4, 6, 8, 9, 10, 12, 14 15, 16..
For example 0 has many factors
0 times 3 0times 4
Step-by-step explanation: You know that it is a prime if the only number divisible by the number is one. If there are more numbers than 1 then it is composite.
The table shows the sports interests of 75 students.
Sport
Football
Basketball
Swimming
Soccer
Cross Country
Number of Students
24
19
12
15
5
What is the probability that one student likes either swimming or soccer?
a. 0.36
c. 0.34
b. 0.27
d. 0.55
Answers
Answer:
A: 0.36
Step-by-step explanation:
Add all of the numbers up = 75
Add both swimming and soccer up = 27
divide 27 by 75 = 0.36
A glass of water was one eighth of a liter. How many glasses would it take to fill up a 3 liter jug
Answers
Final answer:
It would take 24 glasses to fill up a 3 liter jug.
Explanation:
To fill up a 3 liter jug, we need to determine how many glasses of water, each measuring 1/8 of a liter, would be required.
First, we need to find the number of glasses in 1 liter. Since 1 liter is equivalent to 8 glasses (1/8 * 8 = 1), we can divide 3 liters by 1/8 liter to find the number of glasses for 3 liters.
3 liters is equal to 3 / (1/8) = 3 * 8/1 = 24 glasses. Therefore, it would take 24 glasses to fill up a 3 liter jug.
what Is 12 divided by 1/3
Answers
When you divide something by a fraction, it’s easier to think of multiplying its opposite, or reciprocal.
Put the following equation in slope intercept form. 10x - 5y = -20 Is the correct answer y = 2x + 4?
Answers
Add five y on both sides so u get
10x=-20+5y
Add 20 on both sides
10x+ 20= 5y
Divide by five
2x+4=y
So yes, u were correct
a car is driving a cross-country traveled 180 miles in 4 hours. at this rate of speed, how many miles farther will the car travel in the next three hours?
Answers
Robin tosses two number cubes 100 times and get a pair of 3s 18 times. What is the probability that she will roll a pair of 3s on her next toss?
Answers
-
18/100
Then you can reduce it to:
-
9/50
Or are a percent:
-
18%
-
So the probability of her rolling 3s would be 18%
Of the 3,558 people impaired drivers killed in 2009 (not counting the drivers themselves) death were preventable
Answers
Final answer:
The preventable nature of deaths caused by impaired driving, emphasizing the impact of alcohol and other risky behaviors on driving safety.
Explanation:
Each day in the United States, over 8 people are killed and 1,161 injured in crashes reported to involve a distracted driver, highlighting a significant public health concern. There is a noted problem with young drivers getting into serious automobile accidents, contributing to many preventable deaths.
It has been estimated that 35 percent of all U.S. early deaths in 2000 could have been avoided by changing just three behaviors, with alcohol being a significant contributing factor to risky behavior on the roads.
In 2014, alcohol-impaired driving fatalities accounted for 9,967 deaths, which is 31% of overall driving fatalities, underscoring the critical need for improved driving safety measures and individual behavior changes to reduce these numbers.
Use these functions to answer the questions.
f(x)=(x+3)2−1
g(x)=−2x2+8x+3
h(t)=−16t2+28t
Part A What are the x- and y-intercepts of the graph of the function f(x)? Identify the coordinates of any maxima or minima of the function. Explain your answers. Part B Write the function g(x) in the form y=a(x−h)2+k . Write the equation for the line of symmetry for the graph of g(x). Show all your work and explain your answer. Part C The function h(t) gives the approximate height, in feet, of a dolphin's jump out of water, where t represents the time,
Answers
We have [tex]f\left(x\right)=\left(x+3\right)^2-1[/tex]. To solve for the x-intercept, we set f(x) equal to 0. That is
[tex]\left(x+3\right)^2-1=0[/tex]
[tex]\left(x+3\right)^2=1[/tex]
Take the square root of both sides,
[tex]x+3=1[/tex]
[tex]x=-2[/tex]
The x-intercept is (-2,0).
To solve for the y-intercept, we set x=0. That is
[tex]y=\left(0+3\right)^2-1=3^2-1=9-1=8[/tex]
The y-intercept is (0, 8)
The coordinates of the optimum point are actually the vertex which can be easily seen from the vertex form equation given above. The minimum point is (-3, -1).
Part B.
We have [tex]g\left(x\right)=-2x^2+8x+3[/tex].
Factor out -2
[tex]=-2\left(x^2-4x\right)+3[/tex]
Complete the square
[tex]=-2\left(x^2-4x+4\right)+3-2\left(4\right)[/tex]
Simplify
[tex]g(x)=-2\left(x-2\right)^2-5[/tex]
Part C
We have [tex]h\left(t\right)=-16t^2+28t[/tex].
The maximum height is 12.25 feet after 0.875 seconds from the time of the jump. The dolphin will be back in the water after 1.75 seconds. The graph of the jump is shown in the photo.
on a protractor there are two scales read 1 scale to find 44 what is the measure on the scale
Answers
0.16+0.45 eaqkesbnnn
Answers
If you were supposed to add 0.16 and 0.45, the correct answer would be 0.61.
Short answer: 0.61 || 61/100
Why?
When you're adding two decimals, as long as it doesn't have a whole number, you can just add down like so.
1
0.16
+ 0.45
_______
0.61
In fraction form, it is 61/100, because we have the decimal number, and put it to how long it is. (hundred[th])
Hope this helped you! ♥
Determine the average rate of change from 0 to 4 for the function f(x)=2^x-3
Answers
The median and interquartile range of a set of data is shown. Write a set of data consisting of seven values for the pair of measures.
Median: 5 Interquartile Range: 5
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If the IQR is 5, we then know that the difference between y and r is 5.
Let's find the 1st and 3rd quartiles. Focusing on the 1st 3 numbers, we see that the 1st quadrant is y; focusing on the last 3 numbers, we see that the 3rd quadrant is r. The IQR is r-y = 5. Just supposing that y were 4, r would be 9:
x 4 y 5 q 9 s
We could arbitrarily let x = 3, y = 4, q = 5 and s = 9: 3 4 4 5 5 9 9.
We must check this!
What is the median? Since there are 7 numbers here, we take the middle number (5) as the median. This agrees with the problem statement.
Next, we find Q1 and Q3. Q1 is the number between 3 and the 2nd 4, and is 4. Q3 is 4+5, or 9, because the IQR is 5. This agrees with the problem statement.
find the value of this expression if x= -6 and y=1. xy^2/-7
Answers
Hope it's right
x=-6
y=1
xy^2/-7
substitute the values;
-6*1/-7 = 6/7 = 0.857