Answers
Answer:
x=20
Step-by-step explanation:
Related Questions
1)The equation y=−4.9x2+8.82x+1.96 represents the height of the trajectory of a ball x seconds after it was released. The solutions to 0=−4.9x2+8.82x+1.96 are x=−0.2 and x=2. Which of these solutions represents the time it takes the ball to hit the ground?(1 point)
a) both x=−0.2 and x=2
b) x=−0.2
c) x=2
d) Neither of the solutions represents the correct time.
2) The equation y=−4.9x^2+19.5x+1.75 represents the height of the trajectory of a ball x seconds after it was released. At what time is the ball 10 meters above the ground?(1 point)
a) The ball never is never 10 meters above the ground.
b) approximately 0.5 seconds and 3.5 seconds
c) approximately 3.5 seconds
d) approximately 0.5 seconds
A baseball player throws a baseball directly upward into the air. The height of the ball is given by the equation y=−4.9x^2+89.5x+1.75 where y is the height in meters and x is the time in seconds. Is this equation a reasonable model for the ball's trajectory? Explain(1 point)
a) No, the initial height is 1.75 meters, which is much taller than any person.
b) No, the equation does not match the model for projectile motion.
c) No, the initial velocity would be 89.5 meters per second. This is approximately 200 miles per hour, which is faster than any human can throw a baseball.
d) Yes, the equation matches the model for projectile motion, so it is a reasonable model for the ball's trajectory.
The equation y=−16x2+275 models the height of a projectile where y is the height in meters and x is the time in seconds. Which of the following situations is the real-world scenario that is best modeled by the given equation?(1 point)
a) A ball being dropped from shoulder height.
b) A child tossing a ball into the air.
c) A stone being dropped off of the edge of a cliff.
d) A tennis ball being launched into the air by a tennis racket.
Answers
Answer:
Number 1 is A
Step-by-step explanation:
Solving systems of equations using substitution with both equations in y=mx+b PLEASE HELP ME I WILL GIVE BRAINLIEST. I WILL HAVE TO DO APE.X IF I DONT GET THESE RIGHT. THANKYOU!
Answers
1.
y = x + 11 y = 1 + 11
y = 12x y = 12
x + 11 = 12x
11 = 11x
x = 1
(1, 12)
2.
y = 2x - 1
y = x + 1
2x - 1 = x + 1
x = 2
y = 2(2) - 1
y = 3
(2, 3)
3.
4x + 6 = 2x +2
2x = - 4
x = -2
y = 2(-2) + 2
y = -2
(-2, -2)
4.
-4x + 10 = -2x
-2x = - 10
x = 5
y = - 10
(5, -10)
5.
3x - 2 = -2x + 3
5x = 5
x = 1
y = 1
(1, 1)
6.
-7x - 4 = x + 4
-8x = 8
x = -1
y = 3
(-1, 3)
Find the circumference. 7. d = 9 in.
Answers
Answer:
18.85
Step-by-step explanation:
C=2πr=2·π·3≈18.84956
Which expression is equivalent to 5x +10y-15?
A. 5(x-2y-3
B. 5(x5y-10
C. 5(x+2y-3
D. 5(x2y-15
Answers
Answer:
C
Step-by-step explanation:
Answer:
its a hehehehehehhehehe\
Step-by-step explanation:
if in ∆ABC, angle C=90 then cos(A+B )=
Answers
Answer:
180
Step-by-step explanation:
Cause all together this angel would equal 360.
90 is one side of the triangle and a and b will both be 45 so 45+45+90
Hola, ayudenme a hacer esto por fa, doy muchos puntos u,u
Answers
Answer: Hi, help me do this by fa, I give a lot of points u,u
Step-by-step explanation:
Answer:
de donde viene la hoja asi la investigo y te digo las respuestas :)
Step-by-step explanation:
Guys please please help help
Answers
Answer:
1) Option d - 500.00 cm or 5 m
(375 / 75 ) x 100
2) Option a = 324
[( 3560 / 300 ) x 45 ]
I hope im right!
Answer:
1. D- 500
2. A- 534
( If correct please mark brainliest. Thank you. :))
Step-by-step explanation:
what is the answer to this question you will need to be good at maths and you need to know how to do inequalities
28>6x-2
Answers
Answer:
5 > x
Step-by-step explanation:
28 > 6x -2
(add 2 to both sides)
30 > 6x
(divide through by 6)
5 > x
Answer:
x < 5
Step-by-step explanation:
Given
28 > 6x - 2 ( add 2 to both sides )
30 > 6x ( divide both sides by 6 )
5 > x , that is
x < 5
What benchmark would you round the following mixed number to?*
1 1/6 choices: 11/12,1,2,21/2
Answers
Answer:
11/12 is the answer
Find the distance between C(-5,4) and Q(2,0)
Answers
9514 1404 393
Answer:
√65 ≈ 8.06
Step-by-step explanation:
The distance formula is used for the purpose.
d = √((x2 -x1)² +(y2 -y1)²)
d = √((2 -(-5))² +(0 -4)²) = √(7² +(-4)²) = √(49 +16)
d = √65 ≈ 8.0622577
The distance between C and Q is √65, about 8.06 units.
y - 7.74 = 9.1
solve for y
Answers
ANSWER y=16.84
Answer:
y = 16.84
Step-by-step explanation:
y - 7.74 = 9.1
=> y = 9.1 + 7.74
=> y = 16.84
If HF=4x+9, EF=5x + 3, and FG EH, solve for X (pictures included)
Answers
Answer:
[tex]\boxed{\textsf{ The value of x is \textbf{6}}}.[/tex]
Step-by-step explanation:
Given that in the given figure , HF = 4x + 9 and EF = 5x +3 . And FG [tex]\perp[/tex] EH . we need to find the value of x .
And here the two triangles must be congruent to each other . That is ,
[tex]\sf \triangle EGF \cong HGF [/tex]
So we can say that
EF = HF ( by cpct )Using this equation we have ,
[tex]\sf\implies EF = HF \\\\\sf\implies 4x +9=5x+3\\\\\sf\implies 4x - 5x = 3-9\\\\\sf\implies -x=-6\\\\\sf\implies \boxed{\pink{\sf x = 6}}[/tex]
you do 90 sit-ups in 2 minutes .Your friend does 126 sit-ups in 2.8 minutes .Do these rates form a proportion?
Brainiest
Answers
Answer:
Yes
Step-by-step explanation:
90/2 = 45
126/2.8 = 45
Therefore these rates do form a proportion
Step-by-step explanation:
so we will find the number of sit-ups the friend should do, if it is a direct proportion
let the number of friend's sit-ups be x
2 : 2.8
90 : x
cross multiply
we get x=126 sit-ups
so the rates do form a (direct) proportion
Find the slope of the line through (6. 2) and (4, -2)
A. 0
B. 1/2
C. Undefined
D. 2
Answers
Answer:
2
Step-by-step explanation:
[tex]m=\frac{y2-y1}{x2-x1} =\frac{2-(-2)}{6-4} =\frac{4}{2} =2[/tex]
Equation that has a slope of -4 and passes through the point (-2, 2) show work too
Answers
Answer:
y=-4x-6
Step-by-step explanation:
y=mx+b, where m is the slope and b is the y-intercept
Slope is given as -4, so:
y=-4x+b
To find b, sub in the point we were given (-2,2):
2=-4(-2)+b
2=8+b
b=2-8=-6
So we have: y=-4x-6
Out of 80 students, 60% of them passed. How many students passed the test?
Answers
The figure below shows a line graph and two shaded triangles that are similar:
A line is shown on a coordinate grid. The x axis values are from negative 20 to positive 20 in increments of 4 for each grid line. The y axis values are from negative 5 to positive 5 in increments of 1 for each grid line. The line passes through the ordered pairs negative 16, negative 4, and 0, 0, and 16, 4. A shaded right triangle is formed so that its hypotenuse is from ordered pair 0, 0 labeled as O to negative 8, negative 2 labeled as A, one leg is from 0, 0 to 0, negative 2, and the second leg is from 0, negative 2 to negative 8, negative 2. Another shaded right triangle is formed with the hypotenuse from negative 8, negative 2 to negative 12, negative 3 labeled as B, one leg is from negative 8, negative 2 to negative 8, negative 3, and the second leg is from negative 12, negative 3 to negative 8, negative 3.
Which statement about the slope of the line is true?
A. The slope from point O to point A is fraction 1 over 4 times the slope of the line from point A to point B.
B. The slope from point O to point A is 4 times the slope of the line from point A to point B.
C. It is 4 throughout the line.
D. It is fraction 1 over 4 throughout the line.
Answers
The answer should be D
Pythagorean theorem - please help
Answers
answer:
x = 4[tex]\sqrt{2}[/tex] or 5.6568
step-by-step explanation:
know the formula and plug informula: a^2 + b^2 = c^2
now plug in what we havewhatever the RIGHT ANGLE points to is the HYPOTENUSE or cthe other two sides are the "legs" or a and ba^2 + b^2 = c^2
7^2 + b^2 = 9^2
49 + b^2 = 81
b^2 = 32
b = 4[tex]\sqrt{2}[/tex]
in this case, b would be used as xx = 4[tex]\sqrt{2}[/tex] or 5.6568 (exact value)
Prove the Difference of Two Cubes Identity
Explain how you can prove the difference of two
cubes identity
2-12 = (a - b)(a + ab +62
Answers
The table below displays data that Stacy collected. What type of association exist between the data
Answers
Step-by-step explanation:
-2/3. for every 3 it increase it goes down by 2
Factorise:a(a-2)-b(b-2)
Answers
Step-by-step explanation:
hope u got it...
thank you
How many degrees Celsius is 51°F?
Answers
Answer:
10.56
Step-by-step explanation:
51°F − 32) × 5/9 = 10.56°C
Answer:
10.56°C
Step-by-step explanation:
Hope this helps!
Can someone please explain to me step by step how to solve this problem ..
Answers
Answer:
4
Step-by-step explanation:
1. 8 to the power 2/3, can be just told as take the square of 8 and perform cube root or perform cube root of 8 and then square the result.
2. 8^2 = 64
3 .3√64
4. 4. 3√8=2
5.2^2 = 4.
Given the graph, determine whether (a) the degree is even or odd and (b) the leading coefficient is positive or negative.
Answers
B- postivive
Two trains, Train A and Train B, weigh a total of 443 tons. Train A is heavier than Train B. The difference of their weights is 279 tons. What is the weight of each train?
Answers
Answer:
164
Step-by-step explanation:
443-279
=164
Answer:
443 - 279 = 164
Step-by-step explanation:
so train A should be 279 pounds
and train B should be 164 pounds
So sorry i might be wrong i tried my best
The world's fastest man, Usain Bolt,
sprinted an amazing 62. 64 meters in 6
seconds. At this rate, how many meters
did Usain Bolt travel in 4 seconds? 1
Answers
Answer:
41.76 meters
Step-by-step explanation:
Usain Bolt's speed = [tex]\frac{62.64}{6}[/tex]= 10.44m/s
=> In 4 seconds Usain Bold can run: 10.44 x 4 = 41.76m
The difference between forty- six and a number
Answers
Answer:
d = 46 - n
Step-by-step explanation:
i'm assuming you need an equation
a class has 28 students the ratio of girls to boys is 4:3 how many girls are in the class
Answers
Answer:
What are the answer choices?
Step-by-step explanation:
Answer:
16 girls
because 4+3=7 when you add the ratios which is the total number of parts in the ratio.
then you divide 28/7=4 which is equal to one part
then you multiply 4x4 because you are trying to find out the number of girls and there are 4 part girls in the ratio. 4x4=16 so therefore there are 16 girls in the class
simple word problem, I’ll mark brainliest try to explain ur answer to please!
Answers
Answer:
26.8
Step-by-step explanation:
x/145 = 18.5/100
cross-multiply:
100x = 2682.5
x = 26.8
Answer:
26.825
Step-by-step explanation:
when you find 18.5 percent of 145 pounds you will get your answer. hope this helps
In the following figure ABC~XYZ. Based on the
given information find AC.
A) 18cm
B) 14cm
C) 10cm
D) 7cm
Answers
Answer:
A.18cm
Step-by-step explanation:
hope it can help
goodluck