factorise
a) 4p²-81
b) x²-13x+36
Answer:
A = (2p + 9) (2p - 9)
B = (x - 9) (x - 4)
Step-by-step explanation:
For A : Rewrite 4p^2 as (2p)^2.
(2p)^2−81
Rewrite 81 as 9^2.
(2p)^2−9^2
Since both terms are perfect squares, factor using the difference of squares formula, a^2 − b^2 = ( a + b ) ( a − b ) where a = 2p and b = 9 .
(2p + 9) (2p − 9)
For B : Consider the form x^2 + bx + c . Find a pair of integers whose product is c and whose sum is b . In this case, whose product is 36 and whose sum is − 13 .
-9, -4
(x - 9) (x - 4)
I hope this helps.
• Earth: $$ kilograms
• Sun: $$ kilograms
How many Earths weigh about as much as the Sun?
Use scientific notation.
This is due in ten mins help plz
Mrs. Ryan did 121 sit-ups in 8 minutes. Estimate the number of sit-ups she did in 1 minute.
Answer:
he did 15 sit ups in 1 minute.
Step-by-step explanation:
you divide 121 and 8
Answer:
15 sit-ups per minute
Step-by-step explanation:
121÷8=15.125
15
factorise k^2 + 5k + 6
Answer: (k+2) (k+3)
Step-by-step explanation:
Factor 5^2 +5k+6 using the AC method.
What is the equation in standards form of the line y=1/9x+5
PLZZZ HELPP anyonee plzzzz
Answer:
The correct answer is B
Step-by-step explanation:
its is B because when dividing fractions the division symbol changes into a multiplication sign and the fraction on the right flips
High Hopes^^
Barry-
Which of the following expressions is equivalent to 30 + 40?
A. 5(25 + 35)
B. 10(3 + 4)
C. 15(2 + 3)
D. 5(6 + 8)
Answer:D. 5(6+8)
Step-by-step explanation:First you need to distribute. Multiply 5 by both numbers inside parentheses. 5x6=30 and 5x8=40. This gives you 30+40
Hey what’s 20 times 20 minus 58 divided by 6? -3-
Answer:
390
Step-by-step explanation:
Answer:
57
Step-by-step explanation:
20*20=400
400-58=342
342/6=57
como podria saber la cantidad de cuadros de la bandera de wiphola sin contar
Answer: If you mean a translation, it is How could I know the number of squares of the wiphala flag without counting.
The wiphala flag has 49 squares.
Step-by-step explanation:
I’m not sure if i am correct with my answer. Can Someone help or confirm which answer it is or if i’m correct or not? :)
Answer:
First Option.
Step-by-step explanation:
I need help with this please
Angle 1 and 2 are supplementary angles.
This is ur answer....
Supplementary angle.....
A car manufacturer advertises that its new car model goes from 0 to 80 miles per hour
in 5 seconds based on a test drive. During the first 5 seconds of the test drive, was
the car's speed ever exactly 45 miles per hour?
Answer: dang you live in moco too
Step-by-step explanation:
Simplify the following expression:
-9(14p - 8) - 4p
Step-by-step explanation:
-126p + 72 - 4p
-130p + 72
Hello! I need help with my math homework! I need it ASAP.
6x - 3 = -18 + x
Answer:
x = -3
Step-by-step explanation:
6x - 3 = -18 + x
Subtract x from each side
6x-x - 3 = -18 + x-x
5x -3 = -18
Add 3 to each side
5x-3+3 = -18+3
5x = -15
Divide each side by 5
5x/5 = -15/5
x = -3
through: (-3, 2), parallel to y = -
4
5
x + 1
Answer:
[tex]y=\frac{-4}{5}x-\frac{2}{5}[/tex]
Step-by-step explanation:
passes through (-3,2), parallel to y=-4/5x + 1
[tex]y-y_{1} =m(x-x_{1} )\\y-2 =\frac{-4}{5} (x+3)\\y-2=\frac{-4}{5}x-\frac{12}{5}\\y=\frac{-4}{5}x-\frac{2}{5}[/tex]
Solve for m.
m+9=-2
m=?
Answer:
-11
Step-by-step explanation:
Because you just carry the nine over which when you switch it sides it becomes negative so it's -9 + -2 which equals negative 11
some number is added to itself the result is multiplied by eight is four what is that number
Answer:
X=1/4
Step-by-step explanation:
(x+x)*8=4
(2x)*8=4
16x=4
X=4/16=1/4
Answer:
0.25
Step-by-step explanation:
First...
Assume that the number is x and make an equation.
(x + x) 8 = 4
Next...
Add.
(2x) 8 = 4
After that...
Divide.
2x = 4/8 so 2x = 1/2
Finally...
Divide more
x = 1/4 or 0.25
So your answer is 0.25.
I did double-check.
What is the equation of a line with a
slope of -2 and crosses the vertical axis
at the point (0, 5)?
Answer:
y=-2x+5
Step-by-step explanation:
the slope is m and the y-intercept is b in the form y=mx+b, and -2 is the slope and 5 is the y-intercept in this equation, so y=-2x+5
Answer:
y=-2x+5
Step-by-step explanation:
y=mx+b
m is the slope which is -2
b is the y intercept which is given in the problem, 5
Which transformation will create a similar and a congruent triangle?
Rotation
Reflection
Dilation
Translation
Convert 66 ft/sec to miles per hour. (1 mi = 5280 ft)
348,480 mi/hr
45 mi/hr
80 mi/hr
288,000 mi/hr
0.75 mi/hr
96.8 mi/hr
Answer:
45
Step-by-step explanation:
If Vivian rides for 7 hours on a bicycle, what is her rate if she rides 84 miles?
Answer:
12
Step-by-step explanation:
84/7 is 12, so she was going 12 mph
What is the product of 4x - 1 and 3x + 5?
Answer:
the right answer is 7x+4
calculate E, the amount of euros that has the same value as D U.S. dollars, using the equation E=17/20D=
The given equation is: E=17/20 D , where E=amount of Euros and D= amount of U.S dollar.
Now for 1 U.S dollar, we need to plug D=1 into the above equation. So, we will get.........
E=17/20(1)
E=1/20=0.85
0.85 Euros have the same amount as 1 U.S dollar.
HOPE IT HELPS (◕‿◕✿) SMILE!!
Someone please help me with these I’m stuckkkkkkkkkk!!! It’s Due in less than 5 minutes ofmymgmtmtmrmfndnka
Answer:i can help with the first 3 #1 = 6, #2 = 13, and #3 = 7
Step-by-step explanation:
Answer:
A:5.91607978
b:13.0384048
c:2.11660105
I don't know D e or f(I dont know how to solve those......)
Step-by-step explanation:
There is a daily fee for renting a moving truck, plus a charge of $0.50 per mile driven. If driven 48 miles, it costs $64 to rent a truck.
Answer:
The total would be $88
Step-by-step explanation:
First multiply $0.50 and 48 miles
$0.50x48=$24.00
Then add $24.00 and $64.00
$24.00+$64.00=$88.00
Hope this helps :)
Have a nice day :)
Can you give me brainliest plz :)
Solve for n. 170-4n=120
Answer:
n = 12.5 or 25/2
Step-by-step explanation:
170-4n = 120
1. Subtract 170 from both sides to isolate -4n.
-4n = -50
2. Divide both sides by -4 to isolate the n.
n = 12.5 or 25/2
Hope this helped!
Answer:
12.5
Step-by-step explanation:
170 - 4n = 120
-170 -170
-4n = -50
4n = 50
n = 12.5
3-(2)/(9)b=(1)/(3)b-7
Answer:
b=18
Step-by-step explanation:
A 300-g package of pepperoni costs $4.29.
a) What is the cost per 100 g?
b) How much would 1 kg cost?
c) How much pepperoni could you buy with $20?
Answer:
a. $1.43 per 100 gram
b. $10.43 for a kilogram (1000 grams)
c. 1 kilogram and 398 grams, or 1398 grams
Step-by-step explanation:
Lesley and Enid left their waitress a 15% tip.
The tip was $10.25.
What was their total bill, not including the tip?
Answer: $68.37
Hope this helps;)
Answer:
Cost before tip: $68.34
Cost after tip: $78.59
Step-by-step explanation:
Please see attached image. Calculations are executed in black. Answers are highlighted in blue. Solution explanation is provided in red. Implicit/'skip-over' steps are in green.
~~
Hope this helps.