Answers
Answer:
Step-by-step explanation:
1). 3x(2x - 2) = 3x(2x) + 3x(-2) [By distributive property]
2). x²(_ + 5x - 3) = (3)x² + x²(5x) + x²(-3)
3). _(x² - 3x + _) = x(x²) - (x)(-3x) + (x)(2)
4). (2x + 9)(x + 2) = 2x(x + 2) + 9(x + 2)
= 2x² + 4x + 9x + 18
= 2x² + 13x + 18
5). (z - 4)(2z + 1) = z(2z + 1) + (-4)(2z + 1)
= 2z² + z - 8z - 4
= 2z² - 7z - 4
Related Questions
5 of 5
Pip, Angad and Nick share some sweets in
the ratio 3:1:1. Pip gets 36 more sweets
than Nick. How many sweets are there
altogether?
Answers
Pip: 3k
Angad: k
Nick: k
Pip gets 36 more than Nick
3k-k=36
k=18
All together:
3k+k+k
=5k
=5(18)
=90
Is (5,2) a solution to this system? x+4y=13 x-y=3 *
Answers
Answer:
yes
Step-by-step explanation:
Answer:
Yes.
Step-by-step explanation:
x + 4y = 13
x - y = 3 Subtracting:
0 + 4y - (-y) = 13 - 3
5y = 10
y = 2.
Plug y = 2 into the second equation:
x - 2 = 3
x = 5.
How do I know where to put numbers on a graph
Answers
Answer:
X axis is on the left of the Coordinates (x,y) and Y axis is on te right
X goes sideways
Y goes Vertical
Step-by-step explanation:
Can you answer plz
у = х + 3
у =-2x-3
Answers
Answer:
x = - 2, y = 1
Step-by-step explanation:
Comparing both the equations,
→ y = y → x + 3 = - 2x - 3
=> x + 3 = - 2x - 3
=> x + 2x = - 3 - 3
=> 3x = - 6
=> x = - 6/3 = - 2
Substitute the value of x in any of these:
=> y = x + 3 = - 2 + 3 = 1
Answer:
Step-by-step explanation:
If a solution exists for the system of equations y=y so we can say
x+3=-2x-3 Add 2x to each side
3x+3=-3 Subtract 3 from each side
3x=-6. Divide each side by 3
x=-2, since y=x+3
y=-2+3
y=1
So the solution to the system of equations is the point (x,y)=(-2,1)
You have 84 feet of streamers. You cut 24 pieces that are each 1/2 yard long. How many feet of streamers do you have left?
Answers
Answer:
48
Step-by-step explanation:
If we have 84 feet of streamers. You cut 24 pieces that are each 1/2 yard long then 48 feet of streamers we left.
What is Unit of Measurement ?A unit of measurement is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same kind of quantity.
Given that we have a 84 feet of streamers.
You cut 24 pieces that are each 1/2 yard long.
Need to find the feet of streamers we left.
We know that 1 yard is equal to 3 feet.
Therefore, 1/2 yard is equal to 1.5 feet.
The total length of the streamers that were cut is:
24 pieces x 1.5 feet/piece = 36 feet
To find out how much streamer is left, we can subtract the length of the cut streamers from the total length we started with:
84 feet - 36 feet = 48 feet
Therefore, you have 48 feet of streamers left.
To learn more on Unit of Measurement click:
https://brainly.com/question/14026238
#SPJ2
At 5:00 a.m., the temperature outside was 6°F below zero. By 12:00p.m., it rose by 9°F. At 7:00 p.m., the temperature
dropped by 5°F. What was the evening temperature?
A. -20°F
B. 8°F
C. 20°F
D. -2°F
Answers
Answer:
-2 degrees Fahrenheit
Step-by-step explanation:
math also I'm asian
Can someone help me out with this question? Thanks
Answers
Answer:
160
Step-by-step explanation:
vertical angles
Answer:
its 80
Step-by-step explanation:
because of vertical angles the 160 is the same for the other side so you subtract the 80
Please help this is 2 step equations even if you answer some I’ll appreciate it. I need the work though. I’ll mark you brainliest !
Answers
Move the constant to the right
Then calculate
1: r=10
2: n= -10
3: p= -9
4: -r= -6
5: K = -4
6: n= 15
I hope you understood you can finish the rest you just need to practice more to understand
Remember multiply the denominator by both sides to remove the fraction.
. Lisa predicted that more people sent 80 to 99 emails than 0 to 19 emails per week. Is Lisa's prediction true or false?
Answers
Answer:
I think the answer is truth
additive inverse of -4/7
Answers
Answer:
1/7
Step-by-step explanation:
please answer this :(
Answers
Answer:
68.9°
Step-by-step explanation:
Using Sine rule
x/sin X = y/sin Y
4.5/sin X = 4/sin 56
sin X × 4 = 4.5 × sin 56
sin X = 4.5 × sin 56/4
X = arc sin (4.5 × sin 56/4)
X = 68.85449°
Approximately = 68.9°
if u answer right ill give u brainlyist
Answers
Answer:
A
Step-by-step explanation:
'A' because it asks about pros and cons.
$6.00 times 200 per day times 65.00 per day for saftey
Answers
................
on Monday you buy two apples and three oranges for a total of $14 on Tuesday you buy four apples and five oranges for $24 what does an apple cost and what does an orange cost? what are the two equations
Answers
=4a+5b=$24
Multiply the first equation by 4 and the second by 2 to get the value of b....
8a+12b=56 -
8a+10b=48
2b=8
b=$4
If the price of an orange is $4 we can now find the price of an apple by
.................2a+(3*$4)=$14
............2a+12=14........2a=2
a=1
So the cost of an apple is $1 and that of an orange is $4
......Hope it helps you
A student need to fill a tank with 9 liters of water. How many 1/3 liters will it take to fill the tank?
Answers
Answer:
Number of [tex]\frac{1}{3}[/tex] liters required to fill the tank = 27
Step-by-step explanation:
Amount of water needed to fill the tank = 9 liters
Measure of water to fill a vessel = [tex]\frac{1}{3}[/tex] liters
Number of [tex]\frac{1}{3}[/tex] liters vessels required to fill the tank = [tex]\frac{9}{\frac{1}{3}}[/tex]
= 9 × [tex]\frac{3}{1}[/tex]
= 27
Therefore, number of [tex]\frac{1}{3}[/tex] liters required to fill the tank = 27
For every 2 cups of sugar in the cookie recipe, there are 5 cups of flour.
What is the ratio of cups of flour to cups of sugar?
Answers
Answer:
2:5
Step-by-step explanation:
A restaurant offers a dinner salad for $3.75. There is a choice of a lettuce salad or a spinach salad. Then there is a choice of one topping from mushrooms, beans, or cheese. Finally, there is a choice of dressing from ranch, oil, or vinegar. How many different salad combinations are possible?
Answers
Answer:
There are 12 possible salad combonations
Step-by-step explanation:
Answer:
12
Step-by-step explanation:
The person above me is correct ;)
the y-intercept is the y -value of the point at which the graph of a function crosses the y-axis True or False
Answers
Answer:
True
Step-by-step explanation:
The y intercept is where the line "crosses through" or "goes through" the y axis.
its a angle question.
PLS HELP
Answers
this is an equilateral triangle, and by the indicators on the lines, we know the bottom angles have to be the same
we also know that angles in a triangle sum to 180
with this information we can work out the angle x
180 - 24 = 156
156/2 = 78
The answer is 78
Write and expression that could determine the area of the rectangular field.
Determine the length and width of the field rounded to the nearest tenth if the area is 300 ft2.
Answers
Answer:
to find the area of a rectangle multiple the length by the with the formula is 8 = LW where a is the area l is the length w is the width and* means multiple
Jasmine made a scale drawing of an office. The scale of the drawing was 4 inches: 3 feet. The desk is 8 inches long in the drawing. How long is the actual desk?
Answers
Answer:its 6 feet
Step-by-step explanation:
Find the slope of the line through the points (-3,1) and (-1,5).
Answers
Answer:
The slope is 2
Step-by-step explanation:
(-3,1)
+2 ——> (-1,5) <—— +4
m = y/x —> 4/2 —> 2
m = 2
Answer:
[tex]\boxed {\boxed {\sf m=2}}[/tex]
Step-by-step explanation:
The formula for slope is:
[tex]m= \frac {y_2-y_1}{x_2-x_1}[/tex]
where (x₁, y₁) and (x₂, y₂) are the points on the line.
We are given the points (-3,1) and (-1,5). Therefore,
[tex]x_1= -3 \\y_1= 1 \\x_2= -1 \\y_2=5[/tex]
Substitute the values into the formula.
[tex]m= \frac {5-1}{-1--3}[/tex]
Solve the numerator.
[tex]m= \frac{4}{-1--3}[/tex]
Solve the denominator.
-1 --3= -1+3 =2[tex]m=\frac{4}{2} \\[/tex]
Divide.
[tex]m=2[/tex]
The slope of the line is 2.
ill mark u brainliest pls show work
Answers
Answer: Function A; 14 meters per seond
Step-by-step explanation:
do Distance/time for Function A: so you can show 140/10, or 280/20, it doesnt matter as they are all constant/consistent.
A has a rate of 14 m/s
B's rate is given, 13 m/s
So A has a faster rate of 14 meters per second
Help
Write a function to represent the set of ordered pairs.
{(2, -1), (4, 5), (6, 15), (8, 29)}
Answers
Step-by-step explanation:
ES6 has a new Set data structure for storing sets of unique objects. However it is based on object references as opposed to value comparisons. As far as I can tell this makes it impossible to have a set of pairs of numbers without stringifying.
For example, typing in Chrome's console (needs Chrome 38+):
> var s = new Set(); < undefined > s.add([2, 3]); < Set {[2, 3]} > s.has([2, 3]) < false <--- was hoping for 'true'
This appears to be by design: since I passed a different array of [2, 3] to has(), it returns false, because although the contents is the same it only looks at object references, and I allocated a new and different array to pass to has(). I would need to store a reference to the original array I passed to add() to check with has(), but this is not always possible. For example if the number pairs represent co-ordinates, I might need to check if the set has [obj.x, obj.y], but this will always return false since it allocates a new array.
The workaround is to stringify the arrays and key on strings like "2, 3" instead. However in something performance-sensitive like a game engine, it is unfortunate if every set access needs to make a string allocation and convert and concatenate number strings.
Does ES6 provide any feature to solve this problem without stringifying, or is there any feature on the horizon with ES7 that could help as well?
javascriptperformancedata-structuressetecmascript-6
Share
2
Follow
asked Sep 21 '14 at 13:06

AshleysBrain
20.4k1515 gold badges8181 silver badges119119 bronze badges
Add a comment
3 Answers
ActiveOldestVotes
3
As you've noted [2, 3] === [2, 3] is false, meaning you can't use Set like this; however, is Set really the best option for you?
You may find that using a two-level data structure like this will be better for you
var o = {}; function add(o, x, y) { if (!o[x]) o[x] = {}; o[x][y] = true; } function has(o, x, y) { return !!(o[x] && o[x][y]); } function del(o, x, y) { if (!o[x]) return; delete o[x][y]; // maybe delete `o[x]` if keys.length === 0
How many inches are in 7 and 1/2 feet?
Answers
Answer:
90 inches
Step-by-step explanation: 7 feet*12 inches= 84 and .5 feet*12 inches= 6.
84 inches+ 6inches=90inches
Answer: 1.2ft × 12
= 14.4"
Step-by-step explanation:
GIVE ME DA BRAINS
If your test marks in your last 3 tests were: 70%, 82%, and 90%, what's your average test mark?
Answers
Answer:
80,66
Step-by-step explanation:
70 + 82 + 90 = 242
for average: you have 3 tests, so 242÷3 = 80,66667
Find the slope hurryyy
Answers
Answer:
-5
Step-by-step explanation:
Answer:
The slope is -5
Step-by-step explanation:
hope it helps....
have a great day!!!
find the size of the lettered angles
Answers
It is con so cos-1(9/10)
Sorry I don’t have a calculator but type that equation in for your answer:)
Shirley bought 20.8 pounds of bird seed at a bargain store. She wants to fill her feeder 100 times
with anequal amount. How much seed should she put in the feeder each time?
Answers
Answer:
0.208
Step-by-step explanation:
Hope this helps....
Answer:
0.208
Step-by-step explanation:
can someone please help me with this.
Answers
Answer:
A
Step-by-step explanation: