Answer:
my guess would be b
Step-by-step explanation:
if wrong sorry
Scientific notation, 8th grade math KA- correct answers only thx
Answer:
3.84 * 10^{-2}
Step-by-step explanation:
You can convert the first one into 0.041 as it is multiplied by [tex]10^{-2[/tex]. The second one can be converted into 0.0026 as it is multiplied by [tex]10^{-3[/tex].
[tex]0.041-0.0026=0.0384[/tex]. In scientific notation, this is [tex]3.84 * 10^{-2}[/tex].
100 POINTS+BRAINLIEST 8TH GRADE MATH PT 2: Word problem involving algebraic equations on them-As usual please explain the steps simply and some things to remember. answers for points will be reported :))
Answer:
[tex]\sf a. \quad \dfrac{21}{10+x}+\dfrac{21}{10-x}=5[/tex]
Step-by-step explanation:
Formula for calculating speed:
[tex]\boxed{\sf Speed=\dfrac{Distance}{Time}}[/tex]
Therefore:
[tex]\boxed{\sf Time=\dfrac{Distance}{Speed}}[/tex]
Given values:
x = the current (in mph)Speed = 10 mphDistance = 21 milesTotal time = 5 hoursIf the boat is traveling downstream, the current (x mph) will be pushing the boat faster, and so the boat's speed will increase by x mph.
Therefore, the expression for the time it takes for the boat to travel downstream is:
[tex]\sf Time\:(downstream)=\dfrac{21}{10+x}[/tex]
If the boat is traveling upstream, the current (x mph) will be pushing against the boat and so the boat's speed will decrease by x mph.
Therefore, the expression for the time it takes for the boat to travel upstream is:
[tex]\sf Time\:(upstream)=\dfrac{21}{10-x}[/tex]
Therefore, if the total time it takes to travel downstream and upstream is 5 hours:
[tex]\implies \sf \dfrac{21}{10+x}+\dfrac{21}{10-x}=5[/tex]
To solve for x:
[tex]\implies \sf \dfrac{21}{10+x}+\dfrac{21}{10-x}=5[/tex]
[tex]\implies \sf \dfrac{21(10-x)}{(10+x)(10-x)}+\dfrac{21(10+x)}{(10-x)(10+x)}=5[/tex]
[tex]\implies \sf \dfrac{21(10-x)+21(10+x)}{(10+x)(10-x)}=5[/tex]
[tex]\implies \sf21(10-x)+21(10+x)=5(10+x)(10-x)[/tex]
[tex]\implies \sf 210-21x+210+21x=5(100-10x+10x-x^2)[/tex]
[tex]\implies \sf 420=500-5x^2[/tex]
[tex]\implies \sf 5x^2=80[/tex]
[tex]\implies \sf x^2=16[/tex]
[tex]\implies \sf x=\pm4[/tex]
Therefore, the rate of the current is 4 mph.
Question 7(Multiple Choice Worth 5 points)
(01.02 MC)
If (92)P=98, what is the value of p?
02
03
04
06
Answer:
4, Third option
Step-by-step explanation:
When you get 9^8 the answer is 43046721. So when raising a power to a power, the products should equal 8. Using simple math, we can determine that 4x2=8. To check our work you can calculate (9^2)^4, which equals 43046721. Now we can now for sure that this answer is correct. Hope this helps!
Claire tried to evaluate an expression step by step.
Find Claires mistake
THIS IS An 8TH GRADE MATH PROBLEM PLS SOLVE ASAP FOR 10 POINTS
I WILL REPORT INCORRECT ASNWERS :))
Answer:
step 1
Step-by-step explanation:
khan academy
Answer:
Claire incorrectly completed step 1 in which the second power of 10 was stated but it should have been the third.
Step-by-step explanation:
Which equation has a constant of proportionality equal to 10?
Choose 1 answer:
A. y = 2/20x
B. y = 30/3x
C. y = 12/2x
D. y = 5/5x
HELP PLEASE!!!! I NEED IT ASAP!!!!!!
Answer:
x=19
Step-by-step explanation:
●Alternate angles are equal
therefore, angle WYZ= angle YWX
2x= angle YWX
●Angles within a triangle sum up to 180 degrees
=3x-5+2x+90=180
▪︎group like terms
=3x+2x+90-5=180
=5x+85=180
▪︎send all x terms to one side of the equation
=5x=180-85
=5x=95
▪︎divide both side by the coefficient of x ; 5
=x=19
PLS HELP 15 POINTS + BRAINLIEST
Examine this system of equations. What integer should the first equation be multiplied by so that when the two equations are added together, the x term is eliminated?
StartFraction 1 Over 18 EndFraction + four-fifths y = 10
Negative five-sixths x minus three-fourths y = 3
Answer:
5/6
Step-by-step explanation:
Three-fourths x + StartFraction 1 Over 7 EndFraction y = 6
StartFraction 1 Over 8 EndFraction x minus three-fifths y = 16
is 5/6
Answer this. Show your work. Worth 15 points. Under 1 day. URGENT.
Answer:C
Step-by-step explanation:
volume is widht x length x depth so it is 5 x 3 x 2 = 30
Answer: C:30
Step-by-step explanation:
ur welcome
A music shop sold twenty five $50.00 radios at a profit of 8% and six $30.00 radios at a loss of 15%. How much was the profit or loss on the combined transaction?
Answer:
Step-by-step explanation:
the original price would be $80.00
50.00*0.08 = 4 50.00-4 = 46.00
46.00 for 25 radios with 4 cash back
30.00*0.15= 4.5 30.00- 4.5 = 25.50
total is 71.50
Finnish the sentences based off the graph
Thanks :) 30 points!!!
Answer:
Step-by-step explanation:
2. y interecept --> y = 1
3. pi
4. 1, 0
8th grade math; correct answers only ty (wrong ones will be reported). have a gud day folks;)
Answer: Both C and D are correct
Step-by-step explanation:
To remove the exponent from the v you need to square root both sides,
the exponent on the v is then canceled out giving you:
[tex]v=\sqrt{25/81}[/tex] or [tex]v=-\sqrt{25/81}[/tex]
Answer:
Both C & D are correct
Step-by-step explanation:
[tex]v^{2} =\frac{25}{81}[/tex]
Root both sides of the equation to remove the square.
[tex]v=\±\sqrt{\frac{25}{81} }[/tex]
[tex]v = \±\sqrt{\frac{5*5}{9*9} } \\v=\±\frac{5}{9}[/tex]
Therefore,
[tex]v=\sqrt{\frac{25}{81} } =-\sqrt{\frac{25}{81} }[/tex]
What is the surface area of a right circular cylindrical oil can, if the radius of its base is 4 inches and its height is 11 inches?
Answer:
1105.8 in³
Step-by-step explanation:
The surface area is the circumference of the base times the height:
A = 2πrh, which, in this problem, works out to:
A = 2π(4 in)²(11 in) ≈ 1105.8 in³
Answer:
The answer will be 1105.8 in³sq inches.
Step-by-step explanation:
You multiply 4x11 which is the diameter of 44. The the radius with it will be 22. To get the surface, you multiply it= 1105.8 in³
Please mark me brainliest!
Please help! Really easy!!
___ - 2.86 = 3.57
2.5 x ____=0.625
___/5.5=0.55
how many four digit natural numbers can be formed using the digits 1,2,3,4 if repitition is not allowed
PLEASE ANSWER: A music shop sold twenty five $50.00 radios at a profit of 8% and six $30.00 radios at a loss of 15%. How much was the profit or loss on the combined transactions?
Answer:
it's 1 the answer is
Step-by-step explanation:
how I got it I did 2 x2 is 4 and 1÷1 is 1 so if I do 1x1 it is 1
What is the COMMISSION:
A sales man of machinery sold 148 machines at $79.50 each. If he received a commission of 7 1/2% then how much was his commission.
Here is a tree diagram showing the sample space for two independent events. What is the probability of getting a total of 13 or more?
Using it's concept, there is a 0.6667 = 66.67% probability of getting a total of 13 or more.
What is a probability?A probability is given by the number of desired outcomes divided by the number of total outcomes.
From the tree diagram, there are 9 outcomes, of which 6 result in a total(first node + second node) of 13 or more, hence the probability is:
p = 6/9 = 0.6667.
More can be learned about probabilities at https://brainly.com/question/14398287
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HELP ASAP!!!!!!!!!!!!!!!
Answer:
38 degrees
Step-by-step explanation:
Since angles KLO and OLM are supplementary, they add up to 180 degrees
So, angle OLM is 180-134=46 degrees
Similarly, angles OMN and OML are supplementary, so they also add up to 180 degrees
So, angle OML is 180-84=96 degrees
You also know that the angles of a triangle sum up to 180 degrees
So, 46+96+x=180
180-142=38
x=38 degrees
HELPPPPPPPP!!!!!!!!!!!!!!!!!!!!!!!!! in assigned photo is the question! doesnt need to be descriptive i just need the answer please, im so behind
Answer: 11
Step-by-step explanation:
Since the smaller triangle is half of the larger triangle
5.5×2=11
Answer:
The correct answer is 11.
Step-by-step explanation:
VERY IMPORTANT: Mr.Rodriguez bought a jacket at $69.50, a tie at $15.50 and a raincoat at $75.35. If he received a discount of 12 1/2% on each of these items then what was his bill?
Answer:
12 1/2% DISCOUNT:
Step-by-step explanation:
Jacket: $60.81
Tie: $13.56
Raincoat: $65.93
Answer this. Show your work. Worth 15 points. Under 1 day. URGENT.
===========================================
Work Shown:
C = circumference = 40 inches
d = diameter
[tex]C = \pi*d\\\\C \approx 3.14*d\\\\40 \approx 3.14*d\\\\\frac{40}{3.14} \approx d\\\\d \approx \frac{40}{3.14}\\\\d \approx 12.73885\\\\d \approx 13\\\\[/tex]
Be careful. Technically 12 inches is the largest diameter Tanya can use since 3.14*12 = 37.68 is under 40; while 3.14*13 = 40.82 is slightly over 40
So if I was the teacher, I would have said "round down to the nearest inch".
HELP ME: A camera usually sells for $68. Because it was slightly damaged, it sold for $59.90, what was the rate of the discount to the NEAREST PERCENT?
WRONG ANSWERS WILL BE REPORTED- PLS GIVE EXPLANATION WTIH ANSWER
8TH GRADE MATH
Answer:
9.5×10¹
Step-by-step explanation:
You want the quotient of 2.85×10⁶ and 30,000 written in scientific notation.
DivisionIt is convenient to adjust the exponents of the operands so the coefficient of the quotient has a value between 1 and 10.
[tex]\dfrac{2.85\times10^6}{30,\!000}=\dfrac{2.85\times10^6}{0.3\times10^5}=9.5\times10^{6-5}=\boxed{9.5\times10^1}[/tex]
__
Additional comment
Your calculator can format the quotient in scientific notation for you.
<95141404393>
You know the height of a chair and the distance of the leg from the other chair, but you don’t know the length from the chair leg to the other leg you need to replace. What is the length of the leg? .Does this make seanse for project option 1 in 03.02
Answer:
a
Step-by-step explanation:
A batch of cookies is 24 cookies. It cost Courtney 134 dollars and 40 cents to make 10 batches of cookies.
How much does it cost Courtney to make 1 batch of cookies? Round to tenths places if necessary.
How much does it cost her to make 1 cookie? Round to the tenth place if necessary.
Answer:
13 dollars and 44 cents, 56 cents.
Step-by-step explanation:
134 dollars are 40 cents = 134.4 dollars.
10b = 134.4
b = 13.44
13 dollars and 44 cents
There are 24 cookies to a batch
24c = 13.44
c = 0.56.
so each cookie costs 56 cents
Answer:
13.44 to make 1 batch. 0.56 to make 1 cookie.
Step-by-step explanation:
If it cost 134.40 to make 10 batches, then you would divide that by 10 for how much it cost for 1 batch.
Then, 1 batch of 24 costs 13.44, you would divide it by 24 for the cost of 1 cookie.
I NEED SOMEONE WHO ACTUALLY KNOWS WHAT THEY’RE DOING TO ANSWER THIS QUESTION.—-
Michelle has a recipe that calls for 2 1/2 cups of vegetable oil. She wants to use 2/3 of that amount of oil and use applesauce to replace the rest. How much vegetable oil will she use?
Answer:
10/6
Step-by-step explanation:
r refer to the above attachment
Answer:
This is a multiplication problem.
2 1/2 * 2/3 = 5/2 * 2/3 = 10/6 or 5/3
She will use 10/6 or 1 2/3 cups of vegetable oil (or applesauce)
Hope this helps, let me know if it's wrong!
Step-by-step explanation:
I NEED HELP ASAP!!! PLEASE HELP ME!!!
Answer:
As the shape forms a rectangle and line segment AB and line segment CD are parallel, you can tell that length of both line segments/sides are equal.
Step-by-step explanation:
Since the answer itself requires an explanation, I added the explanation in the answer area.
Hope that helps! Have a great day!
Can anybody give me an easy way to use prime factorization plssss
Answer: Step 1: Divide the given number by the smallest prime number. ...
Step 2: Again, divide the quotient by the smallest prime number.
Step 3: Repeat the process, until the quotient becomes 1.
Step 4: Finally, multiply all the prime factors.
Step-by-step explanation:
List three solutions for the inequality x ≤ 3 and give three
numbers that are not solutions.
Answer:
2
1
0
Not:
4
9
1921131
Step-by-step explanation:
x needs to be equal or less than 3. It doesn't say that x cannot be negative so any number 3 and below is fine.
Not solutions would be any number above 3 in value
The three solutions for the inequality are 1, 2, and 3.
And, the three numbers that are not solutions are 4, 5, and 6.
Used the concept of inequality that states,
A relation by which we can compare two or more mathematical expressions is called an inequality.
Given that,
The inequality is,
x ≤ 3
Now from the given inequality x ≤ 3,
The solution of the inequality is a number that is less or equal to 3.
Hence the possible three solutions for the inequality are,
x = 1, 2, 3
And, the three numbers that are not solutions are,
4, 5, and 6.
To learn more about inequality visit:
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I REALLY REALLY NEED HELP!!!!!! THIS IS DUE IN 5 MIN!!!
Answer:
b
Step-by-step explanation:
We have proven that ΔACO ≅ ΔBDO using the SAS (Side-angle-side) theorem
Congruent trianglesFrom the question, we are to prove that ΔACO ≅ ΔBDO
From one of the congruent triangles theorem, we have that
If two sides and the included angle of one triangle are equal to two sides and the included angle of another triangle, the triangles are congruent.
This is the SAS (Side-angle-side) theorem.
From the given information,
AB and CD intersect at point O
Thus, AO = BO
Also,
∠ACO ≅ ∠BDO
In the diagram, we can as well observe that CO ≅ DO
Thus, we can conclude that AC ≅ BD
Since sides AC, CO and the included angle ACO are congruent to sides BD, DO and the included angle BDO, we can conclude that ΔACO ≅ ΔBDO using the SAS theorem.
Hence, we have proven that ΔACO ≅ ΔBDO
Learn more on Congruent triangles here: https://brainly.com/question/2938476
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