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R_Scott
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R_Scott
Questions (1)
Marcy has ____ toy animals. She gives 6 to Leslie. She gives 4 to Beth. How many toy animals does Marcy give away?
6 + 4 = ____
1 answer
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Answers (216)
there are (154 / 7) rows (70 / 7) are filled
(300 / 6) / .75
use the quadratic formula to find the roots (zeros) it is factorable, but the results are fractions
looks good
force (weight) is equal to mass multiplied by gravitational acceleration kg * (m/s^2) = Newtons
let n = 1st number (4n + 1) / (n + 1) = (13n + 1) / (4n + 1) (4n + 1)^2 = (13n + 1)(n + 1) ... 16 n^2 + 8 n + 1 = 13 n^2 + 14 n + 1 3 n^2 - 6 n = 0 ... n^2 - 2n = 0 ... n = 0 , n = 2
find moles ... 10.0 g / molar mass there are two C atoms per molecule ... two moles of C for each mole of C2H6 moles of C = 2 * (moles of C2H6) C atoms = (moles C) * (Avogadro's number)
the gravitational potential energy from the 40 m fall becomes kinetic energy K.E. = m * g * h = 8 * 9.8 * 40 the ball still has 60 m worth of gravitational potential energy
the cart's acceleration is ... a = f / m = 16 / 8 distance = 1/2 a t^2 ... find the time to travel 2 m velocity = acceleration * time
(rhondas score) * 9 = 99
8.75 * (2/5) = ?
find the common denominator , convert the fractions , add
someone marked C, which is correct
the answer you "know" is incorrect multiply the 4 and 6 , add the exponents , put into standard form 24 x 10^9 = 2.4 x 10^10
those are the first 7 digits of π (pi), which is irrational the number you have written is rational ... because it has an end
move the decimal point the number of places as the exponent of 10 ... negative is to the left, positive to the right eg. 1.4 x 10^-3 =.0014 ... decimal point 3 places left
11.99 * x < 59.95 ... divide both sides by 11.99
8 x 54 , 16 x 26 , 13 x 32 , etc.
149 + 114 = 263 ... TOO MUCH
because the numbers "commute" (change order) ... but the result stays the same
the absolute value symbol, | |, means just the numerical digits ... not the sign
5 / (2/3) = ?
#7 ... less than half of the calories are from sugar check your answer
sure ... making x=0 puts you on the y-axis ... so that's the y-intercept
PEMDAS is the anagram for operations hierarchy Parentheses, Exponents, Multiplication, Division, Addition, Subtraction 4 + 2 x [ 16 ÷ (5 + 3)] ² 4 + 2 x [ 16 ÷ 8] ² 4 + 2 x [2] ² 4 + 2 x 4 4 + 8 ?
2 and 4 are good 5 is the opposite of 2 what is an aquifer? ... what's in it?
oxygen gas is diatomic
86 / .98 = x / 1.00 86 * 1.00 = x * .98 solve for x
parallel means that it has the same format as the given equation just a different number
does "-0.5 x" change sign when it "crosses" the equal symbol?
40 stamps per page , on 8 pages
independent events ... multiply the individual probabilities to find the probability of both probability of 7th grade girl is ... 3 / (3 + 3) probability of 8th grade girl is ... 7 / (7 + 1)
E = 51 1.7 R = E
K + R = 193 K = R + 35 solve the system
possible rational zeros are combinations of ... all factors of the constant term ... 10 in this case ... divided by all factors of the highest order coefficient ... 2 in this case don't forget negative factors ±10 , ±5 , ±2 , ±1 ... divided by ... ±2
8.4 m is the radius of a circle ... the goat travels the circumference c = 2 * π * r
(change in velocity) / (change in time)
[(x - 6)(x - 4)] / x = 4 ... x^2 - 10 x + 24 = 4 x ... x^2 - 14 x + 24 = 0 (x - 12) (x - 2) = 0 x = 12 , x = 2 logs are not defined for negative values ... x = 12
a^2 + 8 a + 12 = (a + 6) (a + 2)
multiply the two numbers in each binomial pair ... you're looking for 21
only one of the organisms is warm blooded
in the past, lead was added to gasoline to improve automobile performance ... tetra-ethyl lead use of the additive for over fifty years resulted in raised environmental lead levels
the displaced liquid has a mass of 40 g ... (200 g - 160 g) volume = mass / density = 40 g / 0.80 = ? cm^3
yellow is 4/5 of the green mixture ... 4 / (4 + 1) (4/5) * 35 = ?
find the fall time ... 1.3 = 1/2 g t^2 rolling speed = .15 m / (fall time)
which one is different from the other three?
the general slope-intercept equation is ... y = m x + b m is the slope , b is the y-intercept
s = smoker ... p(s) = .20 n = non-smoker ... p(n) = .80 this is a binomial probability ... p(s) + p(n) = 1 (n + s)^10 = n^10 + 10 n^9 s + 45 n^8 s^2 + 120 n^7 s^3 + ... + s^10 the probability is one, minus the sum of the 1st four terms ... 1 - [.8^10 + (10
A ... top 15% ... approx. 1.037 s.d. above the mean ... grade of 80 B ... next 25% ... approx. 0.253 s.d. above the mean ... grade of 73 C ... next 40% ... approx. 0.842 s.d. below the mean ... grade of 62 D ... next 15% ... approx. 1.645 s.d. below the
