A dictionary 3g or 3kg

Answers

Answer 1

Answer: A dictionary would weight about 3kg.
3g is less than a tea spoon in mass!

Answer 2

Answer: It would be 3 kg because the dictionary I have is about 5 kg.

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A store offers a 10% discount on all merchandise as part of its anniversary sale.Select all statements that are correct.A jar that costs $10 will cost $11 after the discount.A bag that costs $30 will cost $27 after the discount.A shirt that costs $20 will cost $18 after the discount.A table that costs $50 will cost $55 after the discount.( There can be multiple answers. )
What's 97156 divided by 107
In the equation 51-14x=84, what does x equal?
Alice wants to find all the prime factors of the number you get when you multiply 17 x 11 x 13 x 7. She thinks she has to use a calculator to perform all the multiplications and then find the prime factorization of the resulting number. Do you agree? Why or why not?
How many 3/8's are in 1

HELP it's a maths question worth 4 marks

Answers

a = 3, b= - 4 and c = - 4

expand the left side using FOIL

(2x + 1)(ax + b) = 2ax² + 2bx + ax + b = 2ax² + x(2b + a) + b

compare the coefficients of expressions on left and right sides.

compare 2ax² + x(2b +a) + b with 6x² - 5x + c

coefficients of x² terms → 2a = 6 ⇒ a = 3

coefficients of x terms → 2b + a = - 5 → 2b + 3 = - 5 → 2b = - 8 ⇒ b = - 4

constant terms c = b = - 4

Alexia and Haley start out together to bike from Apple Valley to Hesperia, a distance of 15 miles. Alexia bikes at 5 miles per hour and Haley bikes at 7.5 miles per hour. Which statement is true?

Answers

I believe the answer is:

Alexia arrives 1 hour later than Hailey.

Good luck! XD

The perimeter of a rectangle is 30 inches. If it's length is three times it's width, find the dimensions. Show work if possible.Next, a volleyball coach plans her daily practices to include 10 minutes of stretching, 2/3 of the entire practice scrimmaging, and the remaining practice time working on drills. On Wednesday, the coach planned 100 minutes of stratching and scrimmaging. How long, in hours, is the entire practice? Show work if possible.

Homework due tommorrow......PLEASE HELP!!!!!

Answers

The rectangle problem:

First, create some variables.
w = width
l = length

Then you know that the length is 3 times the width, so
l = 3w

The equation for perimeter is
P = 2(l+w)

Now you use substitution, substituting the 3w for l because you found that earlier.

P = 2((3w) + w)

And simplify.
P = 2(4w)
P = 8w

And you know P = 30 because they told you that.
30 = 8w
w = 15/4 inches, or 3.75 inches

Now substitute that value back into that first equation,
l = 3w
l = 3(15/4)
l = 45/4 inches, or 11.25 inches.

The dimensions are 11.25in for length and 3.75in for width.

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The volleyball problem:

100 minutes of stretching and scrimmaging combined, and you know 10 have to be stretching, so 90 is scrimmaging.

s = scrimmaging
T = total time

s = 2/3T (they gave you this)
90 = 2/3T
T = (90*3)/2
T = 270/2
T = 135 minutes, or 2 hours and 15 minutes.

Which point is 7 units from (–2, 4)? A.
(–5, 4)

B.
(–2, 3)

C.
(5, 4)

D.
(9, 4)

Answers

The distance formula:
$d=√((x_2-x_1)^2+(y_2-y_1)^2)$

$(x_1,y_1)=(-2,4) \nd=7 \n \n7=√((x-(-2))^2+(y-4)^2) \n7=√((x+2)^2+(y-4)^2) \ \ \ |^2 \n49=(x+2)^2+(y-4)^2$
Check which point satisfies the equation:
$(x,y)=(-5,4) \n49 \stackrel{?}{=} (-5+2)^2+(4-4)^2 \n49 \stackrel{?}{=} (-3)^2+0^2 \n49 \stackrel{?}{=} 9 \n49 \not= 9 \ndoesn't \ satisfy \ the \ equation$

$(x,y)=(-2,3) \n49 \stackrel{?}{=} (-2+2)^2+(3-4)^2 \n49 \stackrel{?}{=} 0^2+(-1)^2 \n49 \stackrel{?}{=} 1 \n49 \not= 1 \ndoesn't \ satisfy \ the \ equation$

$(x,y)=(5,4) \n49 \stackrel{?}{=} (5+2)^2+(4-4)^2 \n49 \stackrel{?}{=} 7^2+0^2 \n49 \stackrel{?}{=} 49 \n49=49 \nsatisfies \ the \ equation$

$(x,y)=(9,4) \n49 \stackrel{?}{=} (9+2)^2+(4-4)^2 \n49 \stackrel{?}{=} 11^2+0^2 \n49 \stackrel{?}{=} 121 \n49 \not= 121 \ndoesn't \ satisfy \ the \ equation$

The answer is C.

a cannonball was shot from the ground into the air with an initial velocity of 160 ft./s. At what time is the cannibals elevation 400 feet

Answers

160 feet per second means that in 2 seconds it would be at 360, then 40 in one 10th meaning it would take 2 1/4 seconds

A square playing field has an area of 1,255 square yards. about how long is each side of the field

Answers

square area=legnth^2 aera=1255 1255=side^2 take squaer root of both sides aprox 35.425979167837 yards=legnth of eachsie

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