Answer:
okay so she needs to sell 80 boxes to make exactly $60 for charity.
Step-by-step explanation:
i'm not sure how you want me to use a number line but...
Substitute the values of x and y into the expression -3x2 + 2y2 + 5xy - 2y + 5x2 - 3y2. Match that value to one of the numbers. What matches what I'm stuck 1. x = 0.5, y = -1/10 2. x = -1, y = -3 3. x =3/4 , y = 2/5 4. x = 0, y = 2.5 5. x = √2, y = √2 6. x = 2, y = -1 The answer thing. -1 9.17 14 -11.25 1.665 0.44
Answer:
1. Putting x = 0.5, y = -1/10 gives 0.44
2. Putting x = -1, y = -3 gives 14
3. Putting x =3/4 , y = 2/5 gives 1.665
4. Putting x = 0, y = 2.5 gives - 11.25
5. Putting x = √2, y = √2 gives 17
6. Putting x = 2, y = -1 gives - 1
Step-by-step explanation:
-3x2 + 2y2 + 5xy - 2y + 5x2 - 3y2
1. Putting x = 0.5, y = -1/10
-3(0.5)^2 + 2(-1/10)^2 + 5(-0.05) - 2(-1/10) + 5(0.5)^2 - 3(-1/10)^2
= -0.75 +0.02 - 0.25 +0.2 + 1.25- 0.03
= 0.44
2. Putting x = -1, y = -3
-3(-1)^2 + 2(-3)^2 + 5(3) - 2(-3) + 5(-1)^2 - 3(-3)^2
= -3 +18 +15+6+5-27
= 14
3. Putting x =3/4 , y = 2/5
-3(3/4)^2 + 2(2/5)^2 + 5(6/20) - 2(2/5) + 5(3/4)^2 - 3(2/5)^2
=- 27/16 +8/25 +30/20 -4/5 +45/16 - 12/25
= 18/16 - 24/25 + 30/20
= 18/16 - 96+150/100
= 18/16 +54/100
= 1800+ 864/1600
= 2664/1600
=1.665
4. Putting x = 0, y = 2.5
-3(0)^2 + 2(2.5)^2 + 5(0) - 2(2.5) + 5(0)^2 - 3(2.5)^2
= 12.5 - 5.0 - 18.75
= -11.25
5. Putting x = √2, y = √2
-3(√2)^2 + 2(√2)^2 + 5(√2.√2) - 2(√2) + 5(√2)^2 - 3(√2)^2
= -6 +4+10-4+19-6
= 17
6. Putting x = 2, y = -1
-3(2)^2 + 2(-1)^2 + 5(-2) - 2(-1) + 5(2)^2 - 3(-1)^2
= -12+2 -10 +2 +20 -3
= -1
Which algebraic expression represents the perimeter of the rectangle?
2x + 2
4x + 3
Answer:
12x + 10
Step-by-step explanation:
Combine the like terms. 4x + 2x and 2 + 3. Parallel sides, 6x times 2 which is 12x. 5 times 2 which is 10. Therefore, your answer is 12x + 10
Which equation shows the relationship in
the table?
2
5
10
40
100 | 200
Weeks (x)
Trees Planted (y)
A y = 2x
B y = 2x + 40
C y = 20x
Dy = 40x
Answer:
It’s y=20x I think.
Step-by-step explanation:
If a toy rocket is launched vertically upward from ground level with an initial velocity of 135 feet per second, then its height h after t seconds is given by the equation h(t) = -16t2 + 135t. How long will it take the rocket to return to the ground?
Answer:
The toy rocket will return to the ground at 8.44 seconds
Step-by-step explanation:
The height h of the toy rocket launched vertically as a function of the time t is given by:
[tex]h(t)=-16t^2+135t[/tex]
The rocket will return to the ground when h=0:
[tex]-16t^2+135t=0[/tex]
Factoring:
[tex]t(-16t+135)=0[/tex]
There are two solutions:
t=0, t = 135/16 = 8.4375
The first solution corresponds to the moment the toy rocket was launched, the second is the time taken by the rocket to return to the ground.
The toy rocket will return to the ground at 8.44 seconds
14 points
correct answers pls:( i need this
Select the correct expressions in the table.
Which expressions are equivalent to the given expression?
(-V9 + V-4) - (2V576 + V-64)
-3 + 2i – 2(24) - 8i
-51 + 61
-3 + 2i + 2(24) + 8i
45 + 10i
:-3 – 2i - 2(24) + si
-51 – 6i
An expression is defined as a set of numbers, variables, and mathematical operations. The expressions that are equivalent to the given expression is -3+2i - 2(24) - 8i and -51 - 6i.
What is an Expression?In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.
The given expression can be simplified as,
(-√9 + √-4) - (2√576 + √-64)
= (-3+2i) - 2(24) - 8i
= -3+2i - 2(24) - 8i
= -3 + 2i - 42 - 8i
= -51 - 6i
Hence, the expressions that are equivalent to the given expression is -3+2i - 2(24) - 8i and -51 - 6i.
Learn more about Expression:
https://brainly.com/question/13947055
#SPJ2
please help me with this, I don’t just want an answer only, I’d love a clear explanation so I could understand I’ll give brainliest to the person who follows my directions thank you. ♥️
Anyone no what this means if so please comment the quarter is ending today and I got a few hours to do my missing work
Answer:
6, 7
Step-by-step explanation:
Your friend has owned a dog for 9 years. This is one year less than twice as long as he has owned the cat. How long has your friend owned a cat?
Answer:
17 years
Step-by-step explanation:
hope it helps:)
Answer:
20 Years.
Step-by-step explanation:
As you could see my friend owned a dog for 9 years, and it reads that it is one year less which is 10 years since 10-1 (aka one year) equals 9 so anyways we know it's 10, and it's twice as long 10 x 2 (aka twice). which is how I got my answer... 20!
Stefan is making meringue with eggs whites and sugar. he uses 50 grams of sugar for every egg white.
if Stefan is making 10 egg whites. how many grams of sugar does he use?
Answer:
500
Step-by-step explanation:
1=50 and 50 x 10 = 500
polygon BCDE (is congruent to) RSTU find the value of y.
1242 miles in 24 hours is miles per hour
Answer: 51.75 mph
Step 1: Divide 1242 by 24 to get your answer, because there are 24 hours in a day.
1242 ÷ 24 = 51.75
Add the mph sign to the answer.
51.75 mph.
Hope this helps you!
PLEASE I NEEEEED HELP ILL G”IVE BRAINLISET
Answer:
The first One
Step-by-step explanation:
Hope This Helps!
Plz Mark Brainliest!
In the standard (x, y) coordiante plane, what is the slope of the line joining the points (0, 0) & (-8 , 2)?
Answer:
-1/4
Step-by-step explanation:
The slope is -1/4
to solve you subtract the x-values and the y-values and remember that slope is y/x
Hope that helps and have a great day!
subtract. write your answer in scientific notation.
(7.15×105)–(5.964×105)
Answer:
124.53
Step-by-step explanation:
7.15×105=750.75
5.964×105=626.22
750.75-626.22= 124.53
lmk if this is right or not :)
Answer with step-by-step explanation:
(7.15 × 105) - (5.964 × 105) = 124.53
750.75 - 626.22 = 124.53
Hope this helped! (brainliest please)
"How long do people spend traveling to work? The answer may depend on where they live. Here are the
travel times in minutes for 15 workers in North Carolina, chosen at random by the Census Bureau:7
30
20
10
40
25
20
10
60
15
40
on
30
12
10
101
(Source: Strive for A5: Preparing for the AP Statistics Examinations)
6.) For the data above, create the 5-number summary, check for any outliers
using the 1.5 * IQR rule.
Answer:
Step-by-step explanation:
1
Hey, wanna pair our account on Brainly so we can share the perks? https://brainly.com/invite/f24654201d6890e3df412bef7ec3ce86?utm_source=invite&utm_medium=link&utm_campaign=bfp_parental_feed&utm_term=parent
Answer:
No
Step-by-step explanation:
Answer: Yes, but can you look on my page and answer the questions ??
Step-by-step explanation:
what are factors of x^2+x-20
hi there! the answer is...
(x − 4) (x + 5)
hope this helped. have a good one!
What is the value of x?
Answer:
8 degrees
Step-by-step explanation:
Mark me the brainliest and rate me please
Answer:
8°
Step-by-step explanation:
Solve the proportion
8/12=20/n
Answer:
n=30
Step-by-step explanation:
The height of a triangle is 5 more than twice the base. If the area of the triangle is 21, then find the base of the triangle.
the question is in the file
Answer:
0.00024
Step-by-step explanation:
= 2.4 × 10-4
(scientific notation)
= 2.4e-4
(scientific e notation)
= 240 × 10-6
(engineering notation)
(millionth; prefix micro- (u))
= 0.00024
(real number)
please help i don’t know how to find the slope
write the equation of a porabola whose vertex is (2,5) and passes through the point (1, 1)
Answer:
y=5-4(x-2)^2
Step-by-step explanation:
A computer downloads a movie at a constant rate. What does the slope represent?
Answer:
hope it helps you
Step-by-step explanation:
A computer downloads a movie at a constant rate. What does the slope represent? 2000
Download (megabytes)
000-
400
Time (min)
CLEAR
CHECK
Number of minutes for download completion
Downloading speed in megabytes per minute
Unit rate of minutes per megabyte
Unit rate of megabytes per movie
Answer:
Downloading speed in megabytes per minute
Step-by-step explanation:
did on ttm
The number written 3.76ee13 in scientific notation
Answer:
yes also what is the question
Please help, the problem is bellow
Unit 1. Lesson 10 Exit Ticket
Name:
1.) A deep-sea diver descends below the surface of the water at a rate of 5.5 feet each minute. What is the
depth of the diver after 1.3 minutes?
Write an expression to represent the problem:
Solve your expression in the box below and write your answer on the blank provided.
Answer
Answer:
The required expression for the depth is [tex]5.5t[/tex] feet.
The depth after 1.3 minutes is 71.5 feet.
Step-by-step explanation:
Let d be the depth of the sea below the surface of the water.
The rate of descending or the rate of increasing the depth, [tex]r= 5.5[/tex] feet/min.
Since, the rate is constant, so,
If the diver reaches the depth, [tex]d[/tex], in time, [tex]t[/tex]. So,
[tex]r= d/t[/tex]
[tex]\Rightarrow d=r\times t[/tex]
So, for [tex]r=5.5[/tex] feet/min, the required expression for the depth is [tex]5.5t[/tex] feet.
After time t= 1.3 minutes.
The depth, [tex]d = 5.5 \times 1.3 = 71.5[/tex] feet.
what is 2,240,000,000 in scientific notation
Answer:
= 2.24 × 10^9
Step-by-step explanation:
= 2.24 × 10^9
(scientific notation)
= 2.24e9
(scientific e notation)
= 2.24 × 10^9
(engineering notation)
(billion; prefix giga- (G))
= 2240000000
(real number)
I can’t figure this out please help ASAP :)
The area is 9 sq. units
Answer:
9 sq units
Step-by-step explanation:
triangle formula is 1/2B*H