Ahmed recorded the temperature outside his window one morning. On the second day, the temperature went up 7 degrees. On the third day, the temperature went down 10 degrees. On the fourth day, the temperature went down 6 degrees, and it was 1°F.What was the temperature on the first day?
Answer:
[tex]-2^{\circ}\text{F}[/tex]
Step-by-step explanation:
Let [tex]x[/tex] be the temperature on the first day
Second day temperature
[tex]x+7[/tex]
Third day temperature
[tex]x+7-10[/tex]
Fourth day temperature was [tex]1^{\circ}\text{F}[/tex]
[tex]x+7-10+6=1\\\Rightarrow x+3=1\\\Rightarrow x=1-3\\\Rightarrow x=-2^{\circ}\text{F}[/tex]
On the first day the temperature was [tex]-2^{\circ}\text{F}[/tex]
The coefficients corresponding to k=0,1,2, ...,6 in the expansion of (x + y)^6 are ___.
A. 0, 1, 6, 15, 15, 6, 1, 0
B. 1, 6, 15, 20, 15, 6, 1
C. 0, 6, 15, 20, 15, 6, 0
D. 1, 6, 15, 15, 6, 1
Answer:b
Step-by-step explanation:
Answer: B.
Step-by-step explanation:
The total weight w, in pounds, of a ferry capable of carrying 64 cars depends on the number of cars c
on the trailer. This situation is represented by the function rule w = 25,000 + 3500c. Graph this
function below and determine if it is continuous or discrete.
Answer:
Step-by-step explanation:
What's the answer?
Answer:
Step-by-step explanation:
Tgjh +=%##
Deon throws a ball into the air. The height h of the ball, in meters, at time t seconds is modeled by the function h(t)=-5t^2+14t+3 When will the ball hit the ground
Answer:
The time the ball will hit the ground is 1.4s
Step-by-step explanation:
Given;
function of the ball's motion; h(t)= -5t²+ 14t + 3h
The final velocity of the ball, v , is given as;
v = dh/dt
v = -10t + 14
When the ball hits the ground, the final velocity, v = 0
v = -10t + 14
0 = -10t + 14
10t = 14
t = 14 / 10
t = 1.4s
Therefore, the time the ball will hit the ground is 1.4s
find the value of x
Ken wants to run 5 kilometers. He ran 230 meters. Then he ran 2 more kilometers. How many more kilometers does Ken need to run?
A. 0.77 km
B. 2.23 km
C. 2.77 km
D. 3.00 km 2
Answer:
The answer is C - 2.77 km
Answer: C=2.77
Step-by-step explanation: because it is lol
what is the system of inequalities for the graph below?
Answer:
hi do You have Instagram?
9514 1404 393
Answer:
y ≥ -2x +1y ≤ 2x +4Step-by-step explanation:
The downward-sloping line has a y-intercept of 1 and a slope of -2, so its equation is ...
y = -2x +1
The graph is shaded on and above that line, so the inequality it represents is ...
y ≥ -2x +1
__
The upward-sloping line has a y-intercept of +4 and a slope of +2, so its equation is ...
y = 2x +4
The graph is shaded on and below that line, so the inequality it represents is ...
y ≤ 2x +4
Then the system of inequalities is ...
y ≥ -2x +1
y ≤ 2x +4
How many solutions does the following equation have?
6(2x – 6) = -7(-2x + 4)
Answer:
6(2x-6)=-7(-2x+4)
6×2x-6×6=-7×(-2x)-7×4
12x-36= 14x -28
12x-14x= -36+28
-2x= -8
x= -8/-2
x= 4
Step-by-step explanation:
4
Select each pair of equivalent number
A. 40/1000 and 40%
B. 6/5 and 120%
C. 50/33 and 117%
D. 1/8 and 12.5%
E. 1/3 and 30%
Answer:
B and D
Step-by-step explanation:
can you all help me with this im stuck and imma need some help.
Answer:
Its the second one
Step-by-step explanation:
Answer:
the 2nd one
Step-by-step explanation:
A ladder is placed against a wall such that the top is 8 feet above the ground. If the ladder is 10 feet long, how far away from the wall is the base of the ladder
Answer:
6 feet
Step-by-step explanation:
Consider the right triangle formed by the wall, ladder and ground.
Let the distance the ladder is from the wall be d , then
Using Pythagoras' identity in the right triangle
The square on the hypotenuse ( ladder) is equal to the sum of the squares on the other 2 sides ( wall and d ), then
d² + 8² = 10²
d² + 64 = 100 ( subtract 64 from both sides )
d² = 36 ( take the square root of both sides )
d = [tex]\sqrt{36}[/tex] = 6
That is the ladder is 6 feet away from the wall
Amir has a bag of dimes and quarters. He has a total of 31 coins worth $5 20. Let x represent the number of dimes and y represent the number of quarters. Which system of equations would be used to find out how many dimes and quarters Amir has?
Answer:
This is the given information for which system of equations would be used to find out how many dimes and quarters Amir has?
x = dimes x = 0.10 or 0.1
y = quarters y = 0.25
31 coins
worth $5.20 = 5.2
x + y = 31
0.1x + 0.25y = 5.2
Step-by-step explanation:
(Brainliest at Random!!!!!!!!!!!!!!!)
Answer:
the last one.
(x^3)^3--3^2
x^6-3^2
x^6-9
(x^3)^3--3^2
Step-by-step explanation:
What is the slope of the line?
Answer:
y=1x+1
Slope is 1
Step-by-step explanation:
Slope = rise/run.
We go up 1 and run 1. The slope is 1.
Let me double check.
The line passes through the points (-1,0) and (0,1).
m = delta y ÷ delta x
m = (0 - 1)/(-1 - 0)
m = -1/-1
m = 1
Yep. The slope is 1.
The tape diagram represents the ratio of the numbers of planets in two different solar systems. There are 8 planets in Solar System B. How many planets are in Solar System A?
The correct answer is 6 planets
Explanation:
The image presented shows the ratio of planets in solar system A vs those in solar system B. In this way, the general ratio is 3 : 4 or 3 to 4; this means for each 4 four planets in solar system B there are 3 planets in solar system A and vice versa. Now, to find the total of planets in system A if there are 8 planets in system B, follow this process:
8 planets / 4 = 2 planets - This means each of the sections in the diagram represents 2 planets
2 section x 3 = 6 planets as in the solar system A there are 3 sections and each of this represents 2 planets, the total of planets in this system are 6
This result can also be found by converting the ratio to a fraction and multiplying this by the 8 planets
8 planets x [tex]\frac{3}{4} = \frac{24}{4} = 6[/tex]
Find the total area of the composite figure.
Plz HURRY
Answer:
71
Step-by-step explanation:
Give a number between -5 and 5 that can be use in the blank to make the equation false? (whole numbers only please)
3x + 2 = 3x + ___
Blair's garden is four feet shorter than double its width. The perimeter of the garden is 64 feet.
The width of the garden is ___ feet.
The length of the garden is ____ feet.
Answer:
The width of the garden is 12 feet.
The length of the garden is 20 feet.
Step-by-step explanation:
Let l be the length and w be the width
Then according to given statements
[tex]l = 2w-4\ \ \ Eqn\ 1[/tex]
Second equation is:
[tex]2l+2w = 64\ \ \ \ Eqn\ 2[/tex]
Putting l = 2w -4 in equation 2
[tex]2(2w-4)+2w = 64\\4w-8+2w = 64\\6w -8 = 64\\6w = 64+8\\6w = 72\\\frac{6w}{6} = \frac{72}{6}\\w = 12[/tex]
Putting w = 12 in equation 1
[tex]l = 2(12)-4 = 24-4 = 20[/tex]
Hence,
The width of the garden is 12 feet.
The length of the garden is 20 feet.
Arianna is buying plants for her garden. She buys 15 flowering plants for $96. Pink flowering plants sell for $8, and purple flowering plants sell for $5. How many pink flowering plants did Arianna buy?
6 pink flowering plants
7 pink flowering plants
8 pink flowering plants
9 pink flowering plants
Answer:
7 pink flowering plantsStep-by-step explanation:
Total number of plants = 15Total cost = $96Cost of pink flowering plant = $8Cost of purple flowering plant = $5Let x and y be the number of plants bought. Then we have equations:
8x + 5y = 96x + y = 15 ⇒ y = 15 - xSubstituting y in the first equation:
8x + 5y = 968x + 5(15 - x) = 968x + 75 - 5x = 963x = 96 - 753x = 21x = 7Correct option is the second one
Which set of lengths are not the side lengths of a right triangle
1. 24,33,42
2. 20,99,101
3. 36,77,85
4. 27,120,123
Answer:
3
Step-by-step explanation:
what is 7x-21=x+3
need step by step
Answer:
[tex]\boxed {x = 4}[/tex]
Step-by-step explanation:
Solve for the value of [tex]x[/tex]:
[tex]7x - 21 = x + 3[/tex]
-Take [tex]x[/tex] and subtract it from [tex]7x[/tex]:
[tex]7x - 21 - x = x - x + 3[/tex]
[tex]6x - 21 = 3[/tex]
-Add both sides [tex]21[/tex]:
[tex]6x - 21 + 21 = 3 + 21[/tex]
[tex]6x = 24[/tex]
-Divide both sides by [tex]6[/tex]:
[tex]\frac{6x}{6} = \frac{24}{6}[/tex]
[tex]\boxed {x = 4}[/tex]
Thus, the value of [tex]x[/tex] is [tex]4[/tex].
Mr. Myers wants to join a music club. The 1st choice music club charges a $5 sign-up fee and $1 each song. The Superstar music club charges no sign-up fee and charges $3.50 each song. After how many songs will the cost of the music clubs be equal? 1st choice Music Equation: ______ Superstar Music Club Equation: ______ Solution: _____ This was due yesterday and I'm having trouble with this stuff, I'm in advanced math but my teacher moves way too quickly, I would appreciate it if you could help me out.
Answer:
1st choice Music Equation: [tex]\$(x+5)[/tex]
Superstar Music Club Equation: [tex]\$3.50x[/tex]
Solution: 2
Step-by-step explanation:
Given that:
1st choice music club:
Charges for one song = $1
Charges for sign - up = $5
Let the number of songs = [tex]x[/tex]
Total cost = [tex]\$5+\$1\times x = \$(x+5)[/tex]
Superstar music club:
No sign up fee and
Charges for one song = $3.50
Total cost = [tex]\$3.50x[/tex]
Given that, cost of each music club becomes equal:
Putting them same:
[tex]x+5=3.5x\\\Rightarrow 2.5x = 5\\\Rightarrow \bold{x =2}[/tex]
After 2 songs, the cost of both the clubs will become equal.
write an equation of the line. slope 2/3 , passes through (- 2, - 6)
Answer:
y=2/3-6
Step-by-step explanation:
Janet can make 4/5 of a necklace in 20 minutes. At this rate, how many necklaces, to the nearest tenth of a necklace, can Janet make in 1 hour?'
Answer:
4
Step-by-step explanation:
4/5 x 5
pleaseee help....leave an explanation if you can
Answer:
A and B
Step-by-step explanation:
Looking at A it is 2/8. If you divide both numbers by the top, which is two, it would become 1/4.
For B, if you divide both numbers by 4 it will also become 1/4.
is this right?
what is the correct answer if I am wrong.
Answer:
i think so
Step-by-step explanation:
everyting looks good to me cuz that would be what my answer was?
(-4, 18) is a solution to:
y = 5x – 2
Payton spent half of her weekly allowance on clothes. To earn more money, her parents let her clean the oven for $8. What is Payton weekly allowance if she ended with $15
Answer:
Payton's weekly allowance is $14.
Step-by-step explanation:
If she ended up with $15 after earning $8, then we to subtract 15 by 8.
15 - 8 = 7
If Payton spent half of her allowance before earning more money from her chore, then her allowance must be 7 times 2.
7 x 2 = 14.
Therefore, Payton's weekly allowance is $14.
Hope this helps! :)
Write a ratio that is proportional to the ratio 9/75
Answer:
A proportion is simply a statement that two ratios are equal. It can be written in two ways: as two equal fractions a/b = c/d; or using a colon, a:b = c:d. The following proportion is read as "twenty is to twenty-five as four is to five."
Step-by-step explanation:
Answer:
I did the equation and I gotten 3/25
Step-by-step explanation:
Hope you like :)
In △ABC, ∠C is a right angle and sinB=725.
What is the value of cosA?
A
725
B
1725
C
1825
D
2425 giving brainliest to whoever answers correctly
9514 1404 393
Answer:
A 7/25
Step-by-step explanation:
The cosine of an angle is equal to the sine of its complement. In a right triangle, angle A is the complement of angle B. So, ...
cos(A) = sin(B)
cos(A) = 7/25