Graphs aren't mandatory, but they may help visual learners see why an equation works a certain way. Also, they are a visual tool to quickly find a solution to a problem. Furthermore, they help with presentations to quickly convey an idea to someone (who may not be well versed in mathematics).
For example, if you save $10 a week and already have $50 in a savings account, then the equation you graph is y = 10x+50. Here x is the number of weeks and y is the amount saved.
Now let's say you want to find out how many weeks it would take to have $90 total. You could use guess and check to get the answer. Or you could use algebra and the substitution property. The visual way would be to graph y = 10x+50 and y = 90 together to note how the two lines intersect at (4, 90) to indicate it will take x = 4 weeks to have y = 90 total.
Pls can someone help me factorise this: a²+9a+8
Answer:
(a + 8)(a + 1)
Step-by-step explanation:
We know that the first term is squared, so we can put it out like this:
a * a
The third term has to be separated so that the sum of the two factors is the coefficient of the second term, 9.
8 = 4 * 2 (does 4 +/- 2 = 9? nope, we can't use that)
8 = 8 * 1 (does 8+/- 1 = 9? yes, when 8 + 1)
So the factor is a + 8 and a + 1.
Put this together and (a+8)(a+1)
what is 9 and 3 8th as a decimal?
Answer: 9.375 or rounded is 9.38
Step-by-step explanation:
Audrey deposits 27 in her account. Then she makes two withdraws, one for 15 and one for 12. what is the total change to the balance in her account?
If Audrey has $27 in her account and she makes a withdrawal of $15 that leaves her with $12. If Audrey then makes another withdrawal of $12 she now has $0 in her bank account
10% of _____= 2
Ill give brainliest ^^
Answer: x = 20
Step by step explanation:
Let's say that "___" = x to get rid of confusion when solving.
The new equation is 10% of x = 2.
Let's rewrite 10% as 10/100 and "of" as the multiplication sign.
10/100 * x = 2
Let's simplify 10/100 as 1/10 by dividing it by 10/10 which is one(there is no change in its value, it just makes our job easier.)
1/10 * x = 2
We can now multiply both sides by 10 to get x = 20.
Let's check: 1/10 * 20 = 2, so it is correct.
Very quickly pleasee!!! What is the remainder when 3 to the power of 2020 is divided by 30
===============================================
Explanation:
Let's see if we can find a pattern where we divide powers of 3 over 30
In other words, let's see if we can find a pattern for (3^n)/30 where n is a natural number {1,2,3,4,...}
We only care about the remainders so ignore the quotients.
This is the pattern of remainders:
3^1 = 3. When divided over 30, we get remainder 3.3^2 = 9. When divided over 30, we get remainder 9.3^3 = 27. When divided over 30, we get remainder 27.3^4 = 81. When divided over 30, we get remainder 21.3^5 = 243. When divided over 30, we get remainder 3.3^6 = 729. When divided over 30, we get remainder 9.We see the pattern repeating again after we get to remainder 3 a second time. The pattern of remainders is {3, 9, 27, 21} which repeats forever.
The length of this cycle is 4. So what we do is divide the exponent by 4 to see what the remainder is. For instance, both 1 and 5 lead the same remainder when we divide by 4. This tells us 3^1 and 3^5 lead to the same remainder as shown in the pattern above.
Similarly, 3^2 and 3^6 lead to the same remainder. These items are spaced exactly four units apart, which is the length of the cycle.
For the exponent 2020, we get 2020/4 = 505 remainder 0
Having a remainder 0 is the same as having remainder 4, when dividing by 4.
So we'll be looking in the fourth slot of the cycle {3,9,27,21} to see the answer is 21.
Dividing 3^2020 over 30 leads to a remainder of 21.
One day your aunt gave you 20 pieces of candy and you ate 2 pieces each day. After a
certain number of days, there are 10 pieces left. Which of the following equations
represents the day, d, when there are 10 pieces left?
Will award brainliest
Answer:
5
Step-by-step explanation:
on day 1 you had 20 pieces and each day you lose 2 pieces. so that means your equation is y=-2x+20. So x = number of days, and y = pieces of candy. Plug in 10 for y, minus 20 to both sides, divide by -2 to each side. Then your answer is 5.
Find the area of the shaded figure.
Answer:
Its 20
Step-by-step explanation:
Because its correct
pls mark me as brainliest
hurry pls i have an test plssssssssssssssssssssssssssssssssss
Answer:
1. -75 ft
5/8 X -120=
5/8= 0.625
0.625*-120 = -75
2. 5
(-2/3) * (2.5) * (-3)
(2.5) * (-3) is -7.5
-7.5*(-2/3)
=5
HEY CAN ANYONE PLS ANSWER DIS MATH QUESTION!!!
Answer:
if its a 9 by9
Step-by-step explanation:
you need AT LEAST 36 feet
(what is (5+16)÷7-2 (simplify the expression)
Answer:
1
Step-by-step explanation:
You have to answer the problem in the parentheses first. 5 plus 16 is 21. 21 divided by 7 is 3 and 3 minus 2 is 1
Answer:
(5+16)÷7-2 = 1
Step-by-step explanation:
(5+16)÷7-2
21÷7-2 (PEMDAS)
3-2
=1
The table shows conversions of common units of capacity.
Units of Capacity
Customary System Units
Metric System Units
1 gallon
3.79 liters
1 quart
0.95 liters
1 pint
0.473 liters
1 cup
0.237 liters
Approximately how many centiliters are in 3 quarts? Round answer to the nearest unit.
29 centiliters
71 centiliters
285 centiliters
316 centiliters
9514 1404 393
Answer:
285 centiliters
Step-by-step explanation:
Using the given conversion factor:
1 quart = 0.95 L = 95 cL
3 quarts = 3 × 95 cL = 285 cL
There are approximately 285 centiliters in 3 quarts.
__
Centi- is a prefix meaning 1/100th. So, 0.95 L (95 hundredths) is 95 cL.
Answer:
its c
Step-by-step explanation:
Find the value of X
163
141
135
150
Answer:
x = 150
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 = 6 , then
sum = 180° × 4 = 720°
Sum the given interior angles and equate to 720, that is
130 + 90 + 120 + 112 + 118 + x = 720, simplifying
570 + x = 720 ( subtract 570 from both sides )
x = 150
Nicole earns $40,768 per year. What are her weekly gross earnings?
1.)$1,568.00
2.)$1,698.66
3.)$784.00
4.)$741.25
Isosceles triangle ABC contains angle bisectors BF. AD and CE that intersect at X
136
132
68
44
Answer:
136
Step-by-step explanation:
Bc i took the flvs test and got it right
The triangle ΔXAC formed by the angle bisectors is an isosceles triangle
The measure of m∠CXA is the option;
136°
Reason:
The given parameters are;
ΔABC = An isosceles triangle
BF, AD, and CE = Angle bisectors, intersect at X
m∠BCA = 44°
m∠XCF = m∠XCD Angles formed by angle bisector CE
We have;
m∠BCA = 44° = m∠XCF + m∠XCD; by angle addition Postulate
∴ 44° = m∠XCF + m∠XCF; by substitution property of equality
44° = 2 × m∠XCF
[tex]m \angle XCF= \dfrac{44^{\circ}}{2} = 22^{\circ}[/tex]m∠EAF = m∠XAF + m∠XAE
m∠XAF = m∠XAE; Angles formed by angle bisector AD
∴ m∠EAF = m∠XAF + m∠XAF
m∠EAF = 2 × m∠XAF
m∠EAF = 44°; by base angles of isosceles triangle
[tex]m \angle XAF= \dfrac{44^{\circ}}{2} = 22^{\circ}[/tex]m∠CXA + m∠XCF + m∠XAF = 180° Angle sum property of a triangle
m∠CXA = 180° - (m∠XCF + m∠XAF )
Which gives;
m∠CXA = 180° - (22° + 22°) = 136°
The measure of m∠CXA = 136°Learn more here:
https://brainly.com/question/13944732
Does anybody know the anwser?
Which of the following equations is correct?
O 105 x 2.4 = 240,000
105 x 0.24 = 240,000
o 104 x 2.4 = 240,000
O 104 x 0.24 = 240,000
Answer:
i have the same question someone helppppppp
Step-by-step explanation:
PLEASE HELP. WILL GIVE BRAINLIEST!!!!!!!!!
Answer:
A
Step-by-step explanation:
Answer:I think it is a
Step-by-step explanation:
pleaseee help mee! i’m so confused:(((
What is the apparent solution to the system in the graph
Answer:
(2, 1)
Step-by-step explanation:
The solution is the point where the two lines intersect. In this case, that is (2, 1)
Which two factors of 40 add up to -14?
-8 and -5
-40 and -1
-20 and -2
40 and 1
8 and 5
-10 and -4
10 and 4
20 and 2
wats the answer? pls tell fast im on the clock
thank u
Answer:
C) 352 cm^2
Step-by-step explanation:
[tex]We\ are\ given\ that\ ,\\Volume\ of\ the\ cylindrical\ vessel = 448\pi\ cm^3\\Height\ of\ the\ cylindrical\ vessel =7 cm\\\\We\ know\ that,\\Volume\ of\ a\ cylinder=\pi r^2h\\Hence,\\\pi r^2h=448\pi \\Substituting\ 7\ instead\ of\ h,\ we\ get,\\\pi r^2*7=448\pi \\Canceling\ \pi \ on\ both\ the\ sides\ we\ have,\\r^2*7=448\\r^2=448/7\\r^2=64\\r=8[/tex]
[tex]We\ now\ know\ that\ ,\\Radius\ of\ cylindrical\ vessel\ = 8\\Height\ of\ the\ cylindrical\ vessel\ =7\\\\Hence,\\CSA\ of\ a\ cylinder\ = 2\pi rh\\CSA\ of\ the\ cylindrical\ vessel = 2*\pi *7*8\\Approxiamating\ the\ value\ of\ \pi\ as\ \frac{22}{7} ,\\CSA\ of\ the\ cylindrical\ vessel = 2*\ \frac{22}{7} *7*8\\=2*22*8\\=352\ cm^2[/tex]
gordon types 3,420 words in 45 minutes. Find the unit rate.
Gordon types ___ words per minute.
ssssssssoooollllvvveee
Answer:
25/2
Step-by-step explanation:
k=y/x =50/4=25/2
your dad is designing a new garden for your backyard. he has 21 ft of fencing to go around the garden. he wants the length of the garden to be 1 ½ feet longer than the width. how long should he make the garden?
Answer:
The garden is 4.5 ft by 6 ft.
Step-by-step explanation:
2x + 2(x+1.5) = 21
2x + 2x + 3 = 21
4x = 18
x = 4.5
If EFG ≅ △ ABD
so FG is
= .......?
help asap
Answer:
FG=BD
Step-by-step explanation:
hope this helps!!
The diameter of a circle is 2 centimeters. What is the circle's circumference?
Use 3.14 for .
I centimeters
This one too! Only help if you know!
Answer:
13º
Step-by-step explanation:
We know a straight line makes 180, so the one opposite 63 is (180-63) which is 117.
We know the interior angles in a triangle make 180. We know two angles 50 and 117 and 50+117=167. 180-167=13.
HELP ME PLS ILL MARK AS BRAINLESS
Answer:
A: 12:18
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
Ratios are normally part to part which knocks off answer choices C and D.
Ratios are written with the smaller value on the left and the large value on the right so it can't be B
So it has to be A
Find the value of x
•10
•90
•45
•20
Answer:
810000x
Step-by-step explanation:
SOMEONE PLEASE HELP ME WITH THIS!!!!
Answer:
Im sure its A
