Answer:
f(9)=-4
Step-by-step explanation:
f(x)=x-13
f(9)=(9)-13
f(9)=-4
Two numbers have a sum of -15 and a
product of -100. What are the numbers?
Answer:
the numbers are -20 and 5
Step-by-step explanation:
The value of a = -20 and b = 5.
Let the numbers be a and b
a + b = -15 ...... i
a × b = -100 ....... ii
From equation i,
a = -15 - b ..... iii
Put equation iii into ii
a × b = -100
(-15 - b) × b = -100
-15b - b² = -100
-15b - b² + 100 = 0
b² + 15b - 100 = 0
b² + 20b - 5b - 100 = 0
b(b + 20) - 5(b + 20) = 0
b - 5 = 0
b = 0 + 5 = 5
a + b = -15
a + 5 = -15
a = -15 - 5
a = -20
Therefore, the value of a = -20 and b = 5.
Read related link on:
https://brainly.com/question/19876483
Two trains begin in Milford and end in Pinkerton, which is 300 miles away. Train A leaves Milford at 10:00 a.m. and travels at a rate of 90 miles per hour. Train B leaves Milford at 8:00 a.m. and travels at 70 miles per hour. Which train(s) will arrive in Pinkerton before 1:00 p.m.?
A.
Train A
B.
Train B
C.
both Train A and Train B
D.
neither Train A nor Train B
Answer:
Train B
Step-by-step explanation:
because If you were to walk 300 miles that would be 6 hours or 5
It costs $3.45 to buy 3/4 ib of chopped walnuts. How much would it cost to purchase 7.5 ibs of walnuts?
Show your work!
Answer:
$3.45
Step-by-step explanation
$3.45 -> 3/4 lb ie (0.75 lb)
x -> 7.5 lb
therefore, x = 7.5 x 3.45/ 0.75
x = 34.5
it costs $3.45 for 7.5 lbs of walnut
$3.45
Step-by-step explanation$3.45 -> 3/4 lb ie (0.75 lb)
x -> 7.5 lb
therefore, x = 7.5 x 3.45/ 0.75
x = 34.5
it costs $3.45 for 7.5 lbs of walnut
Miguel and three of his friends went to the movies. They originally had a total of $40. Each boy had the same amount of money and spent $7.50 on a ticket. How much money did each boy have left after buying his ticket?
Write and solve an equation that represents the situation.
Answer:
$2.10
Step-by-step explanation:
$40 4 people $40 divided by 4 is $10 $10-$7.50 so they have $2.10 left each.
Answer:
8 dollars and 12 cent
Step-by-step explanation:
they all started with 10 dollars and in total spent 7.50 and ill leave you to do the rest of the math
Which graph does NOT represent y as a function of x?
I will give Brainlyest
Answer:
the first one is not a function :)
I NEED HELP NOW FOR A 7TH GRADE MATH PROB
Answer:
It would be A
Step-by-step explanation:
I will give the brainiest if u get the answer right
Answer:
9000 = 900 x 10 ^1
Step-by-step explanation:
8x + 3 (3 - x) = 34
A. x = 5
B. x = 2
C. x = 8
D. x = 4
Answer:
A. x=5
Step-by-step explanation:
8x+3(3-x)=34
We move all terms to the left:
8x+3(3-x)-(34)=0
We add all the numbers together, and all the variables
8x+3(-1x+3)-34=0
We multiply parentheses
8x-3x+9-34=0
We add all the numbers together, and all the variables
5x-25=0
We move all terms containing x to the left, all other terms to the right
5x=25
x=25/5
x=5
I think this is correct.
Answer: its A; x=5
Step-by-step explanation:
8x+3(3-x)=34
distribute the 3 through the parentheses
8x+9-3x=34
then add the like terms
5x+9=34
subtract the 9 to the 34
you shoud get
5x=25
then divide the 5 on both sides and you get your answer of x=5
Which of the following lists is in the correct order from smallest to largest?
0-19-14,5,11
0-7-3, 6,2
11, -12, 15, -19
-13.-19, -21, -24
Answer:
the last one -13 -19 -21 -24
Step-by-step explanation:
Answer
-13,-19,-21-24,11,-12,15,-19,0,19,14,5,11
Jeremy wants to borrow $100 from his brother. His brother agreed but
said he would add a 15% annual interest rate on. Jeremy will be able to pay him back in 10 months. How much interest will he have to pay his brother?
$12.50
$1.25
$125
$13
I think it's 12.50
Im not sure so sorry if im wrong but im 99% sure
Tyler ate x fruit snacks, and Han ate 3/4 less than that. Write an expression for the number of fruit snacks Han ate. You may use fractions or decimals in
Pamela rode her bike at a constant rate of 0.1 kilometer per minute. Which table represents y , the number of kilometers Pamela rode her bike in x minutes?
Answer:
B, The second table.
Step-by-step explanation:
If you rode a bike 0.1 Kilometers per minute, and you ride for 5 minutes, you would have biked 0.5 Kilometers, not 0.1 Kilometers.
Hope I helped! Please leave a rating and a comment! :)
Answer:
B
Step-by-step explanation:
you would multiply the y by 0.1 to get x and it would be the right rule.
Answer this question here :))
What value of w makes the equation 145 = w + 27 true? I NEED THIS ASAP
Answer:
145 = w + 27
145 - 27 = 118
w = 118
Step-by-step explanation:
Use the subtraction method to solve problem like those!
Hope this helped!
Please help!! I need 1-6 answered!! I'll give brainliest!!
Step-by-step explanation:
constant = y / X = 11 /2k =2 / - 10 = - 1 / 5box C .... : where y / X = 1 6 ÷ 1/ 4 = 64y / X = 3/7 ÷ 3 =I / 7 So, y= 1/7 Xy/ X= 21 /6 = 7 / 2 so, y = 7 / 2 XBox BAnswer:11/2
-1/5
64
1/7x
7/2x
B
Step-by-step explanation:
Elena mixes 5 cups of apple juice with 2 cups of sparkling water to make sparkling apple juice. For a party, she wants to make 35 cups of sparkling apple juice. How much of each ingredient should Elena use?
Answer:
The answer is 25 cups of apple juice and 10 cups of sparkling water
Step-by-step explanation:
5+2=7, 35/7=5, so you must multiply each ingredient by 5
Answer:
175 cups of apple juice and 70 cups of sparkling juice
Step-by-step explanation:
Jenny surveyed 40 students at her school and found that 0.55 of the students she surveyed said their favorite class is math. Another 25% of the students she surveyed reported that their favorite class is science. How many more students in the survey prefer math over science?BRAINLIEST
12
22
30
32
Answer:
32 is answer
Step-by-step explanation:
Ankur estimated the quotient of 15 and one-third divided by (negative 4 and two-thirds) to be 3. Which best describes his error?
Ankur multiplied the compatible numbers 15 and –3.
Ankur found that the quotient of a positive number and a negative number is negative.
Ankur found that the quotient of a positive number and a negative number is positive.
Ankur added the compatible numbers 15 and –3.
Answer:
123/78
Step-by-step explanation:
Answer:
its C, Ankur found that the quotient of a positive number and a negative number is positive.
Step-by-step explanation:
i got it right on edge
Charlene has 2 flash drives of the same size that she uses to store pictures and videos. Each drive is holding the same number of GB of data, d. She wants to move everything to a memory card that can hold up to 8 GB
A) Charlene is going to delete 1 GB of data from each flash drive. How can the total amount of data left on the two flash drives be represented as an expression?
B) How can the expression you wrote be used to write an inequality that shows the maximum amount of data each flash drive can have on it in order to have all the data transfer to the 8 GB memory card?
867-5309
If you are a gunter dont respond to this
Erica earn money by tutoring and babysitting. She always tutors for 5 hours each week and the amount she babysits changes from week to week. let x be the hours that arica babysitters. Write an expression to show the total numbers of hours erica works each week.
Numbers That you have to use to solve this problem: +,-, . , =, ( , ), x, 5, 8, 13
Answer: could u put it in a simpler way pls .....
Step-by-step explanation:
BRAINLIST Ming and Omar are partners in a reading contest. Together they need to read 31 books each month for 3 months. Ming has read 16 books. Omar has read 23 books. About how many more books do they need to read?
90
60
50
40
Answer:
50
Step-by-step explanation:
Answer:
50
Step-by-step explanation:
31x3=93
23+16=39
93-39=54
54 rounded to the nearest ten is 50 because the ones digit is less than 5
pls explain whyy ill give u a brainlyest
Answer:
the answer should be c
Step-by-step explanation:
can someone help me with this
WILL GIVE BRAINLIEST! PLEASE HELP! 7th grade math
Can someone please help
Answer:
Jar
Step-by-step explanation:
O.34 for bulk 0.33 for jar
PLEASE HELP!!!!!!!
Which of the following functions represent exponential decay?
y = -2 x
y =(1/2)^ x
7 = 2^ 0.5x
y = 2^x
Answer: C) y=2^0.5x
Step-by-step explanation:
Trust me pls
mmmmm i dont know how to do this
Answer:
See the answer below.
Step-by-step explanation:
The Pythagoras theorem for a right triangle is
c^2 = a^2 + b^2 where c = hypotenuse and a, b are the legs of the triangle.
3 positive integers which fit this formula are called Pythagorean Triples.
3,4 5 are a triple because 5^2 = 3^2 + 4^2 ( 25 = 9 + 16).
and also 17^2 = 15^2 + 8^2 ( 289 = 225 + 64).
Step-by-step explanation:
Pythagorean theorem is [tex]a^{2} + b^{2} =c^{2}[/tex] (c being the largest number)
Pythagorean triples are 3 positive numbers that make this equation true.
let's start with 3,4,5
3²+4²=5²
9+16=25
25=25
Since it's true, it's a triple.
Now 8,15,17
8²+15²=17²
64+225=289
289=289
This is also true, so it's also a triple
Hope this helps!
help help help
pleaseeeee
question down below
How do i measure the diameter of a circle?
Answer:
Step-by-step explanation:
If you know the radius of the circle, double it to get the diameter. The radius is the distance from the center of the circle to its edge. If the radius of the circle is 4 cm, then the diameter of the circle is 4 cm x 2, or 8 cm. If you know the circumference of the circle, divide it by π to get the diameter
there’s 2 basic cases you’ll see to find the diameter (a line that basically cuts the circle in half)
you’ll either be given the radius (the distance between the center of the circle to any point on the circle) or the circumference (the perimeter of the circle)
so you have two equations:
diameter= 2*radius
circumference= diameter * pi
if they gave you the radius, simply multiply by 2 as the first equation states. if they give you the circumference, divide the circumference by pi (which is approx. 3.14)
Solve -2 + 22 < 18 I will give brainlest if answer is correct
Answer:
Simplify -2+22 to 20
20<18
Since 20<18 is false, there is no solution.
Answer:
[tex]20 < 18 \\False[/tex]
Step-by-step explanation:
Add − 2 and 22 . The left side 20 is not less than the right side 18 , which means that the given statement is false.
Hope this helps :)