Answer:
[tex]The\ brother's\ present\ age= 4\ years\\The\ sister's\ present\ age=8\ years[/tex]
Step-by-step explanation:
[tex]Let\ the\ brother's\ present\ age\ be\ x\\Hence\ we\ are\ given,\\His\ sister's\ present\ age=(2x)\\Now,\\The\ brother's\ age\ before\ two\ years=(x-2)\\The\ sister's\ age\ before\ two\ years=3(x-2)\\Also,\\His\ sisters\ age\ before\ two\ years=2x-2\\Hence,\\3(x-2)=2x-2\\3x-6=2x-2\\3x-2x=6-2\\x=4\\Hence,\\The\ brother's\ present\ age= 4\ years\\The\ sister's\ present\ age=2x=2*4=8\ years[/tex]
Answer:
The sister's present age is 8 years old, and the brother's present age is 4 years old.
Step-by-step explanation:
Let [tex]b =[/tex] present age of the brother, [tex]s =[/tex] present age of the sister
[tex]s-2 = (b-2)[/tex] × [tex]3[/tex]
[tex]s-2[/tex] = [tex]3b - 6[/tex]
[tex]s = 3b - 4[/tex]
[tex]s = b[/tex] × [tex]2[/tex]
[tex]= 2b[/tex]
[tex]sb-4 = 2b[/tex] (proved from above equations)
[tex]b = 4[/tex]
[tex]\because s = 3b - 4[/tex]
[tex]\therefore[/tex][tex]s = 3[/tex]×[tex]4 - 4[/tex]
[tex]= 8[/tex]
[tex]\therefore[/tex] the brother's present age is 4 years old, and the sister's present age is 8 years old.
Hope this helps :)
What is the result of this subtraction?
6.3−(4.9−7.8)=
the answer chocies are ;
A
–3.4
B
–6.4
C
3.4
D
9.2
Find the product of the numbers in the third row.
Am I suppose to multiply then??
Answer:
Yes, product means multiply all three, 4*2*7=56
Step-by-step explanation:
g= 3a - 4, for a
Solve for a
Equation
Answer:
Answer is a = -4
3a + 4 = 2a
Subtract 2a from each side
a + 4 = 0
Subtract 4 from each side
a = -4
Step-by-step explanation:
Answer:
a = 1/3g+4/3
Step-by-step explanation:
g=3a−4
Step 1: Flip the equation.
3a−4=g
Step 2: Add 4 to both sides.
3a−4+4=g+4
3a=g+4
Step 3: Divide both sides by 3.
3a /3 = g+4 3
a = 1 /3 g+ 4 /3
Order the set of integers from greatest to least.
{-100, -89, -124, -69, -52}
Answer:
-52, -69, -89, -100, -124
Step-by-step explanation:
Answer:
-124,-100,-89,-62,-52
Step-by-step explanation:
If the number is a high number and it's a negative it is the least. For example, if you have $-100 in your bank account, that's worse than having $-52. I hope this helps.
Solve 8x − 2(x + 1) = 7x + 8. (5 points) Question 3 options: 1) 6 2) −6 3) 10 4) −10
Answer:
3.) 10
Step-by-step explanation:
8x-2(x+1) = 7x+8
8x-2x-1=7x+8
6x-1=7x+8
-1=1x+8
+1 +1
1x+9
/x
x=1+9
x=10
Oscar buys a dozen donuts for a party. Three fourths of the donuts are chocolate. How many donuts are chocolate?
Answer:
9
Step-by-step explanation
There is 12 in a dozen, so 3/4 out of 12 is 9. You can get this by doing 3/4 times 12, or .75 times 12.
Hope this helps!
Answer:
9
Step-by-step explanation:
3/4 divided by 12 is 9
plz brainllest
Can y'all help me plz like i really need help im not lying pllzzz y'all and 30 points
Answer:
10,164
Step-by-step explanation:
|(–3.86 + 6.82)| + |(4.02 – 12.45)|
Answer:
-5.47
Step-by-step explanation:
–3.86 + 6.82=2.96
4.02-12.45= -8.43
-8.43+2.96= -5.47
can somebody plz go answer mine the one that is not answerd
Answer:
what is it about
Step-by-step explanation:
Which graph does NOT represent a function?
Answer:
option 3
Step-by-step explanation:
Using the vertical line test, a function will only he passed through once, option 3 is passed through twice
Using complete math and English sentences; use your available resources ( citation to explain )
How to simplify the following radical expression>>>
√-48
Answer:
We get that √48 = 2⋅2√3. Lastly, step three says to simplify, so we go ahead and multiply the 2⋅2 outside of the square root to get 4√3. That's it! We get that √48 = 4√3.
Step-by-step explanation:
Answer:
The correct answer is √48 = 4√3.
5 (3 - 2y) + 4y = 3
solve please!
Answer: y=2
Step-by-step explanation:
Name each slope on each graph
Answer:
Step-by-step explanation:
1)positive slope
because from left to right (like you read) it goes up
2)undifine slope
because it rises yet run is 0 so m=rise/run=something /0= undefined
3)zero slope
because m=rise/run=0/something= 0
4)negative slope
from left to right the line goes down
A new iPhone cost $700. There is 8% sales tax in Philadelphia. What is the total cost of the iPhone including tax
Answer:
756 dollars
Step-by-step explanation:
Answer:
$756
Step-by-step explanation:
700×0.08=56
700+56=756
What is the percent of decrease from 75 to 21?
Step-by-step explanation:
it's answer is 72 percent
Solve for X . They are alternate angles
Answer:
x=28
Step-by-step explanation:hard to explain maybe look at another response, they would probably do better
Find the value of in the triangle shown below.
13
12
X
Answer:
D) 5
Step-by-step explanation:
a²+b²=c²
12²+b²=13²
144+b²=169
b²=169-144
b²=25
b=√25
b=5
given the functions f(x)=2x-4 and g(x)= x+2 find the value of x
Show your work
x = 0 and x = 4
To find intersection equate them.
x² - 2x - 4 = 2x - 4
subtract 2x - 4 from both sides
x² - 4x = 0 → (take out common factor x)
x(x - 4 ) = 0 ⇒ x = 0 , x = 4
brooooooooooo whats 1234567890987654321234567890987654321234567890987654321234567898765676543234567654343456787898788765432345678 x 12343456565675656565434567890900909999999999999999999??
Answer: 1.523884e+160
Step-by-step explanation:
Answer:
Dunno. Too much work.
Step-by-step explanation:
Thanks for the points.
Multiply: (x2 + 3x + 5)(5x2 + 3x – 1)
Answer:
3(x+3)(3x+x 2 +5)
Step-by-step explanation:
hope it helps
Answer:
5x^4+18x^3+33x^2+12x−5
On skates, Ian can travel `\frac{3}{4}`of a mile in 5 minutes. On his bike, he can travel `3\ \frac{1}{2}`miles in 12 minutes. How fast, in miles per hour, can Ian travel on skates AND on his bike?
Answer:
a) 9 miles/hour
b) 17.5 miles/hour
Step-by-step explanation:
The formula for speed = Distance (Miles) / Time(hours)
a) he can travel 3/4 of a mile in 5 minutes.
= 3/4 miles = 5 minutes
We convert 5 minutes to hour
= 60 minutes = 1 hour
5 minutes = x
Cross Multiply
60x = 5
x = 5/60
x = 1/12 hour
Hence, his skate speed =
3/4miles /1/12 hour
= 3/4 ÷ 1/12
= 3/4 × 12/1
= 9 miles/hour
b) On his bike, he can travel 3 1/2 miles in 12 minutes.
= 3 1/2 = 12 minutes
= 7/2 miles = 12 minutes
We convert 12 minutes to hour
= 60 minutes = 1 hour
12 minutes = x
Cross Multiply
60x = 12
x = 12/60
x = 1/5 hour
Hence, his skate speed =
7/2 miles /1/5 hour
= 7/2 ÷ 1/5
= 7/2 × 5
= 35/2 miles/hour
= 17.5 miles/hour
what is 4r + 3r + 7y + 5r - 2y - 6r ?
A. 5r + 5y
B. 29r - 27y
C. 27ry
Step-by-step explanation:
It's 6r+5y. But it's not in the option
What is the answer to this question ???
Answer:
4/5
Step-by-step explanation:
At 8:00 A.M., Jackie starts at the north end of a 10-mile trail and begins walking south at an average speed of 2 mph. After a while, Jackie gets tired and decided to rent a bike to get to the south end of the trail. She cycles at an average speed of 15 mph. If Jackie gets to the south end of the trail in two hours, how far did she walk? (Round to two decimal places)
Answer:
3.08 milesStep-by-step explanation:
Total distance = 10 milesTotal time = 2 hoursDistance walked = xSpeed walked = 2 mphDistance cycled = 10 - xSpeed cycled = 15 mphUsing the given data we can have the equation below to the time:
x/2 + (10 - x)/15 = 230x/2 + 30(10 - x)/15 = 30(2)15x + 20 - 2x = 6013x = 60 - 2013x = 40x = 40/13x = 3.08 miles rounded to 2 decimal placesPlease help due soon!!!
Answer: 1,-1,-7
Step-by-step explanation:
-3-2(-2)= -3+4= 1
-3-2(-1)= -3+2= -1
-3-2(2)= -3-4= -7
PLEASE HELP I NEED TO FINISH IT TODAY!!!
which equation best represents the relationship between xandy
in the graph
Answer:
y=-3/4x-3
Step-by-step explanation:
Geometry I need help please
Answer:
Whats the problem?
Step-by-step explanation:
1/3 divided by 2
I do not know what it is
Answer:
1/6
Step-by-step explanation:
The answer is 1/6 because 1/6 multiplied by 2 is 2/6 and 2/6 simplified is 1/3
Answer:
i believe its 1/5
Step-by-step explanation:
i believe so i don't know if it is completly true. hope this helps
Can anyone help me please it would be helpful
Answer:
2.2 more kg
Step-by-step explanation:
0.8+3.95=4.75
6.95-4.75=2.2
hope I helped!!
Solve for x. I NEED HELP ASAP!
Answer:
x = 105
Step-by-step explanation:
The sum of the interior angles of a polygon is
sum = 180° (n - 2) ← n is the number of sides
Here n = 7, thus
sum = 180° × 5 = 900°
Sum the interior angles and equate to 900
x + 102 + 165 + 123 + x + 11 + 128 + 161 = 900, that is
2x + 690 = 900 ( subtract 690 from both sides )
2x = 210 ( divide both sides by 2 )
x = 105
