Answers
Answer:
0.5x x (2x+1)Step-by-step explanation:
Related Questions
What is it? A or B I've been stuck for a while please help
Answers
Answer:
Correct choice: B
Step-by-step explanation:
System of non-linear equations
It's given the following system of equations:
[tex]y=x^2+3x+5[/tex]
[tex]y=x+13[/tex]
We'll use the substitution method. Substituting y from the first equation into the second equation, we have:
[tex]x^2+3x+5=x+13[/tex]
Moving all terms to the left side:
[tex]x^2+3x+5-x-13=0[/tex]
Simplifying:
[tex]x^2+2x-8=0[/tex]
Factoring:
[tex](x+4)(x-2)=0[/tex]
There are two solutions:
x=-4, x=2
The first solution gives a value for y:
y=-4+13=9
First solution: (-4,9)
The second solution gives a value for y:
y=2+13=15
Second solution: (2,15)
Correct choice: B
Find the perimeter of the image below.
30.18 units
33 units
28.38 units
34.18 units
Answers
Answer:
125.74 units
Step-by-step explanation:
30.18 units
33.00 units
28.38 units
34.18 units
125.74
Which expression uses the associative property to make it easier to evaluate 6(3/2x1/5) ?
A: 6(2/3x1/5
B: 6(1/5x3/2)
C: (3/2x1/5)6
D: (6x3/2)1/5
Answers
have a good day and have a good Christmas
2x+y=42
8x+7y=36
Using the process of eliminations.
Answers
Answer:
x=43,y=-44
Step-by-step explanation:
hey i hope it helps you
2x+y=42(7)
8x+7y=36(1)
14x+7y=294
8x+7y=36
6x=258
divide both sides by 6
x=43
to get y
2x+y=42
equate x=43
8(43)+7y=36
344+7y=36
344-36=7y
308=7y
divide both sides by 7
y=-44
8. Iris wants to buy two necklaces, one for her sister and one for herself. The necklace for her sister costs $42.00, and the necklace for herself costs $28.00. The sales tax on the purchases is 8%. Find the total cost of Iris's purchases, including sales tax. If necessary, round your answer to the nearest cent. C $75.60 A $64.40 B $5.60 B D $70.00
Answers
Hope this helps
Graph y= -4/5x -7
Algebra
Answers
Solve the following systems of equations algebraically. Write your answer in the form of (x, y).
y = 3x + 5 and y = x + 19
Answers
Let's solve your system by substitution.
y
=
3
x
+
5
;
y
=
x
+
19
Step: Solve
y
=
3
x
+
5
for y:
y
=
3
x
+
5
Step: Substitute
3
x
+
5
for
y
in
y
=
x
+
19
:
y
=
x
+
19
3
x
+
5
=
x
+
19
3
x
+
5
+
−
x
=
x
+
19
+
−
x
(Add -x to both sides)
2
x
+
5
=
19
2
x
+
5
+
−
5
=
19
+
−
5
(Add -5 to both sides)
2
x
=
14
2
x
2
=
14
2
(Divide both sides by 2)
x
=
7
Step: Substitute
7
for
x
in
y
=
3
x
+
5
:
y
=
3
x
+
5
y
=
(
3
)
(
7
)
+
5
y
=
26
(Simplify both sides of the equation)
Answer:
x
=
7
and
y
=
26
PLEASE HELP ME!!!!!!!!!!!!!
Charlie saves $2 for every $9 he earns. Melody saves $4A for
every $12 she earns. Is Charlie's ratio of money saved to money
earned equivalent to Melody's ratio of money saved to money
earned? Explain.
Answers
Answer:
They are the same.
Step-by-step explanation:
Substance X is found in the bloodstream of humans. A random sample of 75 males had a mean content of 28 ppm of Substance X in their blood. A random sample of 50 females had a mean content of 33 ppm of Substance X in their blood. The population standard deviations for males and females are known to be 14.1 ppm and 9.5 ppm, respectively. Use the 88.12% degree of confidence. An appropriate set of null and alternative hypotheses to test whether males and females have the same amount of Substance X in their blood is:
Answers
Answer:
H0: u1 - u2 = 0
H1: u1 - u2 ≠ 0
Step-by-step explanation:
This question requires us to state the hypothesis to be used for this test to know if males and females have the same amount of substance X. I have gone further to also calculate the test statistics too.
Null hypothesis:
H0: u1 - u2 = 0
Alternative hypothesis:
H1: u1 - u2 ≠ 0
X1 = 28, sd1 = 14.1, n1 = 75
X2 = 33, sd2 = 9.5, n2 = 50
We have a 2 tailed test
Alpha = 1-0.8812
= 0.1188
Critical value = 1.56
If z<-1.56 or z>1.56
Reject null hypothesis
Test statistic
= (28-33)/14.1²/75 + 9.5²/50
= -2.37
Therefore we reject the H0 because -2.37 is less than -1.56
Which of the following shows the prime factorization of 72 using exponential notation?
Answers
The prime factorization of 72 using exponential notation is [tex]2^{3} *3^{2}[/tex].
It is required to find the prime factorization of 72.
What is a prime factorization ?Prime factorization of a number is breaking a number down into the set of prime numbers which multiply together to result in the original number. The fundamental theorem of arithmetic says that every positive integer has a unique prime factorization.
Given that:
The prime factorization for 72 is
=2×2×2×3×3 .
=[tex]2^{3} *3^{2}[/tex]
Hence, the prime factorization of 72 using exponential notation is [tex]2^{3} *3^{2}[/tex].
Learn more about prime factorization here:
https://brainly.com/question/20019518
#SPJ2
7.52 divided by 64 =
Answers
You could use a calculator
The following are shoe sizes of a group of bowlers: 6.5 ,7 ,7 ,7 ,7.5, 8, 8.6, 8.5, 9, 9.6, 10.5, 11. What is the mean shoe size of the bowlers?
A. 8.5
B. 8.3
C. 8.7
D. 8.0
Answers
Answer:
8.3
Step-by-step explanation:
Add all of the shoe sizes together then divide by how many shoe sizes there are and you will get your answer
a. What is the decimal for 1 trillionth of a second?
Answers
Answer:
Step-by-step explanation:
1 000 000 000 000 E12
Answer:
Step-by-step explanation:
0.000 000 000 001
There are 3 fourth grade clases with a total of 90 scholars. 2/5 of the scholars have a sister. 1/2 of the scholars have a brother. How many scholars have a sisters?
Answers
Answer:
There are 36 scholars who have a sister.
Step-by-step explanation:
Given that:
Total number of scholars in classes = 90
Fraction of scholars who have a sister = 2/5
Fraction of scholars who have a brother = 1/2
Number of scholars who have sisters = 2/5 of 90
Number of scholars who have sisters = [tex]\frac{2}{5}*90[/tex]
Number of scholars who have sisters = 36
Hence,
There are 36 scholars who have a sisters.
Select all the expressions that could be used to find the area of a running track
that is 1,243 feet long and 8 feet wide.
A. 1,243 + 8
B. 8 × 1,243
C. 8 + (1,000 + 200 + 40 + 3)
D. 8 × (1,000 + 200 + 40 + 3)
E. (8 × 1,000) + (8 × 200) + (8 × 40) + (8 × 3)
Answers
Answer: B,D,E
Step-by-step explanation:
Everyone that is multiplying 1243 by 8
WILL MARK BRAINLIEST PLEASE ANSWER 12/15+5/15 1 NUMBER FOR EACH SLOT
Answers
Answer:
17/15
Step-by-step explanation:
or if u reduce it would be 12/15
Solve the equation
[tex]-6 = x/8 + 4[/tex]
Answers
Answer:
You want to isolate for x -6= x/8+4Subtract 4
-10=1/8* x
Divide by 1/8
x= -80
Please rate positively and give brainlist!
Answer:
x = -80
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Step-by-step explanation:
Step 1: Define
-6 = x/8 + 4
Step 2: Solve for x
Subtract 4 on both sides: -10 = x/8Multiply 8 on both sides: -80 = xRewrite: x = -80Can someone help me with this problem ?
Answers
The answer is 83. 83+5=88. just subtract it.
Answer:
83
Step-by-step explanation:
You would subtract 5 from 88 to get Anjali's current age which is 83.
I Need help with 1-5
Answers
Answer:
1)=0
2)
[tex] \frac{ \sqrt{3} }{?2} [/tex]
3)
[tex] \sqrt{3} [/tex]
4)
[tex]2 + \sqrt{3} [/tex]
5) I don't know that one.
use the table of values to explain if x and y are in a proportional relationship.
Answers
Answer:
Yes, they are in a porpotional relationship.
Step-by-step explanation:
Twice a number is 42 less than five times a number. What is the number?
Answers
Answer:
21
Step-by-step explanation:
I am 90% sure but tell me if i'm wrong
The domain of the function f(x) = -2x is restricted to the positive integers. Which values are elements of the range?
2
-4
0
-6
4
-2
6
Answers
9514 1404 393
Answer:
{-6, -4, -2}
Step-by-step explanation:
If the domain is positive integers, the range is negative even integers. The only ones on the list are ...
-2, -4, -6
WORTH 100 POINTS!
Gerry and Tony live 11 miles apart. Gerry leaves his home at 2:00 PM and bikes toward Tony's house at 25 miles/hour. At the same time, Tony leaves his home and bikes toward Gerry's house at 30 miles/hour. They wave as they pass each other. As soon as each boy reaches the others' home, they turn back around towards their own homes. This time, they stop when they see each other. How far are they from Gerry's home when they stop?
Please write an equation or more than one equation using Distance=Rate*Time.
Answers
Answer:
7miles
equations shown in work image below
work shown on the paper with more explanations because text is hard to write equations (sorry I used km but it is miles for your problem.)
:) please give a heart for thanks
and brainliest crown :)
Step-by-step explanation:
For both d=r*t
Each bikes to others house and leave at the same time so for Tony,
11 = 30*t
t= 11/30 hours
for Gerry,
11 = 25*t
t= 11/25 hours
Comparing these, with LCD,
Tony's time is 55/150
Gerry's time is 66/150
So Tony got to Gerry's house 11/150 hours quicker than Gerry got to Tony's house.
Now they turn around and head back toward each other. If they leave at the same exact time, the elapsed time for each until they met would be the same so t (for tony) = t (for gerry), but Tony got a head start.
We start the stopwatch when Gerry turns around 11/150 hours after Tony has turned around. If Gerry's time to where they meet from Tony's house t(gerry), then Tony's time from Gerry's house is t(gerry) + 11/150
Step-by-step explanation:
For both d=r*t
Each bikes to others house and leave at the same time so for Tony,
11 = 30*t
t= 11/30 hours
for Gerry,
11 = 25*t
t= 11/25 hours
Comparing these, with LCD,
Tony's time is 55/150
Gerry's time is 66/150
So Tony got to Gerry's house 11/150 hours quicker than Gerry got to Tony's house.
Now they turn around and head back toward each other. If they leave at the same exact time, the elapsed time for each until they met would be the same so t (for tony) = t (for gerry), but Tony got a head start.
We start the stopwatch when Gerry turns around 11/150 hours after Tony has turned around. If Gerry's time to where they meet from Tony's house t(gerry), then Tony's time from Gerry's house is t(gerry) + 11/150
Step-by-step explanation:
pick her as the brainliest
Mr.Williams' physical education class lasts 7/8 hours. How many minutes are not spent on instructions? playing game:1/2, instructions: 1/5, warm up and cool down:3/10
Answers
Answer:
I believe the answer is 42 minutes :)
i need help 17 + p > 18
Answers
Answer:
P>1
Step-by-step explanation:
Step 1: Simplify both sides of the inequality.
P+17>18
Step 2: Subtract 17 from both sides.
P+17-17>18-17
P>1
Two doctors is % of 25 doctors
=_____%
Answers
Answer:
50
Step-by-step explanation:
Answer:
I believe it is 5 percent
Step-by-step explanation:
Hope it helps and is right.
How can you express (15 + 30) as a multiple of a sum of whole numbers with no common factor?
A.
2 × (7.5 + 15)
B.
3 × (5 + 10)
C.
5 × (3 + 6)
D.
15 × (1 + 2)
Answers
Answer:b because the equation is right.
Step-by-step explanation:
Step-by-step explanation:
D.
15 × (1 + 2) is you're answer
Kai wrote the number 85 on the board. Is 85 a prime or composite?
Answers
Hello there!
85 is composite.
There are 3 ways of determining whether a number is prime or composite.
Check if the number is even. If it is, it's 100% compositeIf the number is odd, then look at its last digit. If it's 2, 4, 6, 8, 0 or 5, then it is composite.If the last digit is not 2, 4, 6, 8, 0 or 5, look at the factors of the given number. If it has 2 factors, then it's prime. If it has more than 2 factors, it's composite.Hope this helps!
[tex]GraceRosalia[/tex]
I need help with this
Answers
Answer:
D
Step-by-step explanation:
NEED BY TODAY PLEASE GET RIGHT
Answers
30 + (-15) + (-10) + [-5] = 0
