Answers
Answer:
Step-by-step explanation:
1). x² - 8x
To convert this expression into a perfect square trinomial,
x² - 2(4x) + 4² = (x - 2)²
Therefore , 4² = 16 should be added.
Option (4) is the answer.
2). x² + 2x = 3
x² + 2(1)(x) = 3
x² + 2(1)(x) + 1 = 3 + 1 [By adding 1 on both the sides]
(x + 1)² = 4
x + 1 = ±2
x = -3, -1
Option (1) is the answer.
3). 3x²- 18x = 21
x² - 6x = 7
x² - 2(3x) = 7
x² - 2(3x) + 3² = 7 + 3²
(x - 3)² = 7 + 9
(x - 3)² = 16
x - 3 = ±4
x = -1, 7
Related Questions
I don’t understand this at all and it’s due tomorrow! Please help!
Answers
Answer:
5) First you have to find x, then use it with supplementary angles theorem.
6) STQ = 150˚
Step-by-step explanation:
To find x, add (2x+8), (71-x), and 90˚ together to add up to 180˚ (those three angles are supplementary):
(2x+8) + (71-x) + 90 = 180˚
x + 169 = 180
Then solve for x:
x = 11
You can check if x is right by inputing it back into the two equations and see if all three of the angle measures together equal 180˚.
Now, you only need m∠MTS (2x+8) to find m∠STQ...
m∠MTS + m∠STQ = 180˚ because they are supplementary angles.
Input the found x to find m∠MTS:
(2(11)+8) = 30
Subtract 30 from 180 to find m∠STQ:
180 - 30 = 150
m∠STQ = 150˚
Hope this helped :)
Kiera randomly selected 35% of the eighth grade students in her school and asked them their favorite food in the cafeteria. Of the students surveyed, 60 chose chicken nuggets as their favorite food. Based on her school who would choose chicken nuggets as their favorite food served in the cafeteria?
Answers
Answer:
171
Step-by-step explanation:
Percentage randomly selected = 35%
Number of surveyed who chose chicken nugget = 60
To obtain the number who chose chicken nugget based on her school :
number who chose chicken nugget / Percentage randomly surveyed
60 ÷ 35%
60 ÷ 0.35
= 171.42
Approximately 171 students
Order these numbers from least to greatest. 6.992, 6.99, 13/2, 6 5/9
Answers
Answer:
13/2, 6 5/9, 6.99, 6.992
Step-by-step explanation:
find the length of the third side of the right triangle!!!!
Answers
Answer:
8
Step-by-step explanation:
There are two ways to solve this!
1. Use the Pythagorean Theorem
a^2 + b^2 = c^2
6^2 + b^2 = 10^2
100 - 36 = b^2
64 = b^2
8 = b
2. Shortcut using 3-4-5 triangles
A 3-4-5 triangle has to do with the ratios of each side.
In this case, it's 6-8-10, as each number is multiplied by two with the same 3-4-5 ratio. This is a good shortcut for these types of problems and will be handy on tests like the SAT as well! :)
Find the diameter of the circle. please.
Answers
Answer:
4
Step-by-step explanation:
2*radius
Answer:4
Step-by-step explanation:
2*2=4
Samuel opened a savings account and deposited $1,500.00. The account earns 1% interest, compounded annually. If he wants to use the money for senior prom in 3 years, how much money will he have to spend on his outfit and limo?
Answers
Answer:
uhm chile sooooo anywayzz
Step-by-step explanation:
write an equation that is in slope-intercept form for the line that passes through the pair of points: (4, -2) and (8, -6)
Answers
Answer:
Step-by-step explanation:
4-8 -2- -6
4^2 8^2
16+64
80
8.9
c - 21 = 16
c=___? HELP!
Answers
Answer:
Original equation: C-21=16
Add 21 to both sides: C=37
Hope this helps!
in QRS the measure S=90ft the measure Q=79ft and RS=63ft find the length of QR to the nearest tenth of a foot
Answers
Answer:
64.2
Step-by-step explanation:
im not sure
If 12x – 20 =
10x + 20 what is the value of 3x ?
Answers
Answer: 3x=60
Step-by-step explanation:
12x-20=10x+20
X=20
3(20)= 60
Please helpp!
Which postulate proves these two
triangles are congruent?
A. ASA
B. SAS
C. None, not congruent
D. HL
Answers
Answer:
it may be B but I think it's C
Step-by-step explanation:
not sure if this is right, but I would say not congruent. it may be sas but in order for it to be sas then the Angle must be in-between the two congruent sides
Both triangles are congruent by (SAS) side-angle-side postulate.
The correct option is B.
What are congruent triangles?Two triangles are said to be congruent if all three corresponding sides are equal and all the three corresponding angles are equal in measure. These triangles can be slides, rotated, flipped and turned to be looked identical.
Given,
Two triangles
ABC and DEC
AB = DE (Given)
BC = EC (Given)
∠ACB = ∠DCE (Vertical angles at intersection of DB and AE)
By, Side-Angle-side theorem of congruent triangles,
ΔABC ≅ΔDEC
Hence, by side-angle-side (SAS) postulate, both triangles are congruent.
Learn more about congruent triangles here:
https://brainly.com/question/26131452
#SPJ5
Which type of data is best represented using a line plot?
data that changes over time
data that is spread out over a large range of numbers
frequency data that can be plotted under categorical headings
frequency data that can be plotted on a number line
Answers
Answer:
Aa 1
Step-by-step explanation:
PLEASE HELP EASY!!!!!!!!!!
Answers
Answer:
its online survery tool
1/3 + a = 5/4 a = ( )
Help plz!
Answers
Answer: a=4/3
Step-by-step explanation:
Answer:
a = 4/3
Step-by-step explanation:
Hope this will help
Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :
1/3+a-(5/4*a)=0
5
Simplify —
4
1 5
( — + a ) - ( — • a ) = 0
3 4
1
Simplify —
3
Solve : -3a+4 = 0
Subtract 4 from both sides of the equation :
-3a = -4
Multiply both sides of the equation by (-1) : 3a = 4
Divide both sides of the equation by 3:
a = 4/3 = 1.333
Find the measure of the indicated angle
Answers
Answer:
36°
Step-by-step explanation:
(6x)° + 54° = 90°
(complementary angles)
(6x)° = 90°- 54°
(6x)° = 36°
alguien me ayuda con esto ?
Answers
Answer:
como vamos a resolverlo si no nos muestra la recta porque en la recta estan los valores
Simplify: (9a* - 5a'-1)+7a*
Answers
Answer:
The answer is -2a because first you multiple the number and eliminate redundant perenthese then last combine like terms and that how you get -2a
Which equation has the same solution as x^2+10x+9 = 4
Answers
9
(
1
×
9
,
3
×
3
,
9
×
1
)
(
x
−
9
)
(
x
−
1
)
=
0
Now, solve each factor for
0
:
x
−
9
=
0
x
−
9
+
9
=
0
+
9
x
−
0
=
9
x
=
9
and
x
−
1
=
0
x
−
1
+
1
=
0
+
1
x
−
0
=
1
x
=
1
As an estimation we are told 5 miles is 8 km.
Convert 25.9 km to miles.
Answers
Answer:
15 miles i think but i think is a True
PLEASE HELP ME WITH THIS FOR BRAINLIEST
Answers
Answer:
516
Step-by-step explanation:
to solve this equation, multiply both sides by 4
a/4 * 4 = 129 * 4
a = 516
Answer:
a= 516
Step-by-step explanation:
a= 129*4
4*129 = 516
WRITE AN EXPRESSION WITH ATLEAST FIVE TERMS THAT SIMPLIFIES TO 9X+25
Answers
Answer: 19 + 11x - 7 - 2x + 13
Step-by-step explanation:
19 + 11x - 7 - 2x + 13
Bring like terms together
11x - 2x + 19 - 7 + 13
9x + 12 + 13
9x + 25
The point where the graphs of x + 4 = y and 2x + 2 = y intersect has the
coordinates
(6,2)
(2,6)
(1,5)
O
(5, 1)
Answers
2x+2=x+4
2x-x=4-2
x=2
and since there’s only one with a 2 as x the answer is (2,6)
Find the domain and range of the function:
fx) = -√5-x-3
Domain:
Range:
DONE
Answers
Answer:
Domain: [tex]x\leq 2[/tex]
Range: (∞,0)
Step-by-step explanation:
The cost of a mirror is directly proportional to the square of its width. A mirror of width 40 cm costs $24. Find the cost of the mirror if the width is doubled
please answer fast
Answers
Answer:
Step-by-step explanation:
Your answer
Proportion????
So, cost = width
If width is 80 then cost will be 48
I dont know if this right.
Answer accurancy 80%
Mark it as Brainlist answer. Follow me.
Write the equation of the line in slope-intercept form. Explain how you found the slope and the y-intercept .
Answers
Answer:
sry i dont know........
need help on this question
Answers
Answer:
C
Step-by-step explanation:
the answer for this question is
-2 and 6
Help ASAP Glven the system of equations, what is the value of the system determinant?
2x+y=8
X-y=10
Answers
Bottom one is 5 divided by 2
Pls help. Free crown to first answer.
Answers
Answer:
Ummm, thanks I guess?
Step-by-step explanation:
Find the volume of the cylinder. Round your answer to the nearest tenth
2 in.
7 in.
Answers
Pi x 2 squared x 7
= 90cm cubed
If I am earning £4.99 per hour at work , and I work for 38 hours a week how much would I earn in 6 months
Answers
Answer:
like 1000 maybe?
I think that's like a tough estimate
Answer:
4,930
Step-by-step explanation:
38 x 4.99= 189.62
since there are about 26 weeks in 6 months-
189.62 x 26 = 4,930.12