Answer:
c = 3.7
Step-by-step explanation:
c + 1.2 = 4.9
c = 4.9 - 1.2
c = 3.7
What is the length of X?
a = 6.4
b = 12
12. The table of values below describes a quadratic relation. Find the missing value and include calculations that demonstrate that this is the correct value.
Answer:
The quadratic equation is;
y = 3x^2-7x + 5
when x = 4, y = 25
Step-by-step explanation:
Mathematically, the general form of a quadratic equation is;
y = ax^2 + bx + c
From the first point, we have that x = 0
Thus;
5 = a(0)^2 + b(0) +c
c = 5
Now, in a case when x is 2
3 = a(2)^2 + b(2) + 5
3 = 4a + 2b + 5
4a + 2b = -2 ••••••(i)
when x = 6
71 = a(6)^2 + b(6) + 5
66 = 36a + 6b ••••••(ii)
From equation i,
2b = -2-4a ••••(iii)
we can rewrite equation ii as
66 = 36a + 3(2b)
Substitute iii into ii
66 = 36a + 3(-2-4a)
66 = 36a - 6 - 12a
66 + 6 = 36a -12a
24a = 72
a = 72/24
a = 3
Recall;
2b = -2-4a
2b = -2-4(3)
2b = -2-12
2b = -14
b = -14/2
b = -7
So the quadratic equation would be;
y = 3x^2 -7x + 5
Now let us test;
when x = 10, y = 235
That would be:
y = 3(10)^2 -7(10) + 5
y = 300 - 70 + 5
y = 235
This shows that the derived quadratic equation is correct
Now, when x = 4; we have it that;
y = 3(4)^2 -7(4) + 5
y = 48 -28 + 5
y = 20 + 5 = 25
Which of the following is equivalent to(x2+6x+9)
(x-3)(x+3)
(x+2)(x-7)
(x-6)(x+3)
(x+3)2
A delivery company is logging the number of miles each employee drives each day. The company found an average of about 85.6 miles. Assume that the standard deviation is 9.85 miles and that a random sample of 50 drivers was used to determine the average. Which statements are true about this situation?
1.)The 99% confidence interval is from about 81.43 to 90.58 miles.
2.)The 95% confidence interval is from about 82.87 to 88.33 miles.
3.)The margin of error for 95% confidence is about 2.52 miles.
4.)The sample isn’t large enough to use a normal distribution.
5.)The margin of error for 99% confidence is about 3.59 miles.
There are multiple answers
The delivery company's statistics on the average driving miles show that the true statements are:
95% confidence interval ... 82.87 to 88.33 miles.Margin of error 99% confidence ... 3.59 miles.What is the 99% confidence interval?Z score for 99% confidence interval is 2.576 so this can be found as:
= 85.6 ± (2.576 x 9.85) / √50
= (82.01 to 89.19)
What is the 95% confidence interval?Z score for 95% confidence interval is 1.960 so this can be found as:
= 85.6 ± (1.96 x 9.85) / √50
= (82.87 to 88.33)
What is the 95% confidence margin of error?With a Z score of 1.960:
= (1.96 x 9.85) / √50
= 2.70 miles
What is the 99% confidence margin of error?= (2.576 x 9.85) / √50
= 3.59 miles
The correct options are therefore 2 and 5.
Find out more on the margin of error at https://brainly.com/question/10218601.
√4×√9 plz say the answer
Answer:
the answer is 6
Step-by-step explanation:
i took the test, trust me
It takes Jack 11 hours to pick 40 bushels of apples alone. Jill can pick 40 bushels of apples in 9 hours. How long will it take Jack and Jill to pick 40 bushels of apples together. Round to the nearest hour.
Answer:
5 hours
Step-by-step explanation:
Jack 40/11 = 3.64 bushels per hour
Jill 40/9 = 4.44 bushels per hour
together they pick 3.64 + 4.44 = 8.08 bushels per hour
40/8.08 = 4.95 hours
help plsssssss no links or files
Answer:
i just did that earler lol
Step-by-step explanation:
Difference between 3/5 of Raman's present age and his age 4 years ago is zero. What will be his age after 5 years?
Answer: 15 years
Step-by-step explanation:
Given
Difference between [tex]\frac{3}{5}[/tex] Raman's present age and his age 4 years ago is 0
Suppose Raman's present age is [tex]x[/tex]
So, we can write
[tex]\Rightarrow \dfrac{3x}{5}-(x-4)=0\\\Rightarrow \dfrac{3x-5x}{5}+4=0\\\Rightarrow \dfrac{-2x}{5}+4=0\\\Rightarrow x=\dfrac{20}{2}=10[/tex]
His age after 5 years is [tex]x+5=15\ yr[/tex]
Translate the following into math: a number "t" split into four equal groups
A cubic yard is what kind of measurement?
O A. perimeter
O B. surface area
O c. volume/capacity
O D. length
O E. weight
Han and Leila live 7 miles apart. They decide to start walking toward each other's houses at
the same time. Leila walks at a rate of 2.5 miles per hour and Han walks at a rate of 3 miles
per hour. How long will it take for them to meet?
2.5 + 3 = 5.5 total speed
7miles / 5.5 mph = 1.27 hours
Answer:
1.27 hours
Step-by-step explanation:
The first step in this process would be adding both rates of Leila and Han together. We know Leila walks at 2.5 miles per hour and Han at 3 miles per hour.
[tex]2.5 + 3 = 5.5[/tex]
We got our sum as 5.5, so now we must complete Step 2, which is the final step. We must divide 7 by 5.5.
[tex]7 / 5.5 = 1.2727...[/tex]
1.2727 ≈ 1.27
the answer to the Question is 1.27 hours.
Write an equation in standard form for a line that is perpendicular to the line with an equation of y = 3x —5 that passes through the point (8, 5).
Answer:
x + 3y = 23
Step-by-step explanation:
m = -1/3, find 'b'
5 = -1/3(8) + b
15/3 = -8/3 + b
23/3 = b
y = -1/3x + 23/3
multiply each side by 3 to get:
3y = -x + 23
x + 3y = 23
17. A man stands 4300 feet from the Burj Khalifa in
Dubai (world's tallest building). The angle of
elevation from his eyes (5 feet) to the top of the
building is 32°. How tall is the building?
9514 1404 393
Answer:
b. 2692 ft
Step-by-step explanation:
The relation of interest between the sides of the right triangle is ...
Tan = Opposite/Adjacent
Using the given numbers, that is ...
tan(32°) = (building height)/(4300 ft)
Multiplying by 4300 ft, we get ...
building height = (4300 ft)·tan(32°) ≈ 2686.9 ft
This is the height above the observer's eyes, so the height of the building above the ground is ...
2687 +5 = 2692 . . . . feet
The building is 2692 feet tall.
WILL REWARD BRAINLIEST! The diameter of a circle has endpoints P(-4, -6) and Q(12, 4). Write an equation for the circle. Be sure to show and explain all work.
Q.1 What value of p will make this equation true?
Q.2 what value of x makes this equation true?
Answer:
[tex]1. \: p = 10 \\ 2. \: x = 4[/tex]
Each Serving of pasta is 1/2 pound. Drag to correct equation to each amount to show how many 1/2 pound serving Can be made
Step-by-step explanation:
4 pounds is 4÷1=8
2
5 pounds is 5÷1=10
2
debbie owes her brother $25 if she plans to pay him back an equal amount from her savings each day for five day describe the change in her savings each day
Answer:
For 5 days, Debbie will lose 5 dollars from her savings.
Step-by-step explanation:
Una parcela de forma cuadradra mide 1089km2 de superficie cuantos metros mide el lado de la parcela
Respuesta:
3.3 × 10⁴ m
Explicación paso a paso:
Paso 1: Información provista
Superficie de la parcela cuadrada (S): 1089 km²
Paso 2: Determinar la longitud del lado (l) de la parcela
Podemos determinar la superficie de un cuadrado usando la siguiente fórmula.
S = l²
l = √S = √1089 km² = 33 km
Paso 3: Convertir "l" a metros
Vamos a usar el factor de conversión 1 km = 10³ m.
33 km × 10³ m/1 km = 3.3 × 10⁴ m
Tbh I got no clue how to do this so help please
Answer:
I'm not entirely sure but I think you have to start by negative -1 and move back 4 spaces?
Step-by-step explanation:
the Red arrows is pointing towards the negative side of the number line
Can you form a parallelogram by drawing a triangle and then reflecting one or more times? Explain.
Answer:
please give me brainlist and follow
Step-by-step explanation:
No. It is not possible to reflect a triangle in such a way that the result is quadrilateral with any consecutive sides that are congruent.
The measurement of one angle of a right triangle is 42°.
What is the measurement of the third angle?
56°
42
138
48
Answer:
48
Step-by-step explanation:
42 + 90 + x = 180
x = 48
what s
2/3x(23+57)
jeefhjdfblfhlwkejbfhbfkjdsbfwjbf
Answer:
53
Step-by-step explanation:
53.3333333333
Answer:
160 x /3
Step-by-step explanation:
The equation t= 6 + wrepresents the relationship between the number of weeks and the total amount saved.
TRUE OR FALSE
AND WHY
Answer:
hello my followers and my
1) A pizza is cut into 4 pieces. Each piece is then cut into 2 pieces. If
each kid gets 4 pieces, how many pizzas are needed for 60 kids?
Answer: 2 pizzas
Step-by-step explanation: 4 times 4 times 2 is 32. 1/32 divided into 60 to get 2 pizzas
In the figure, a triangular board ABC is right-angled at B. The
lengths of the two legs are 15 cm and 20 cm. If it is rotated about its
hypotenuse, two circular cones are obtained.
(a) Find the height BN of the board with AC as the base.
Measure of BN = 12 cm
solution in attached image !!
off topic but Omg armyyy
Which expression has the same value as -5x+ 10y?
-10y - (-5x)
5x + 10y
10y + 5x
-5x – (-10y)
Answer:
-5x-(-10y)
Step-by-step explanation:
-5x-(-10y)
-5x+10y
Answer:
-5x – (-10y)
Step-by-step explanation:
-5x – (-10y) is the same as -5x+ 10y. The two negatives will cancel out and become a positive.
I NEED HELP WITH THIS IVE RETAKEN IT LIKE 4 TIMES PLS HELP
Answer:
(a)=40 (b)=60
Step-by-step explanation:
(a)=
So first 70 +70 = 140 then 180-140 = 40
(b)
So first 180/3 = 60 all angles =60
50 POINTS!! Please please help find height and volume of pyramid!!!
Answer:
44.68.8m³
hope it helps please mark Brainliest
What is the solution to the equation 1.2m - 0.8 = -2.Om?
m = 0.25
m = 0.4
m = 1
m = 4
Which pair of points graphed below have values that are opposites