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3 years ago

A jar contains jellybeans that are all the same size and shape.

Mathematics

1 answer:

Sergeeva-Olga [200]3 years ago

6 0

G because the first jelly bean was put back so it doesn't matter.

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Identify the trinomial that is a perfect square. 81x^2 − 70x 16 64x^2 − 90x 25 81x^2 − 72x 16 64x^2 − 70x 25

Vilka [71]

Hmm
(a+b)^2=(a+b)(a+b)=a^2+2ab+b^2

basically
for
ax^2+bx+c
it is a perfect trinomial when
b=2(√a)(√c)
remember to take both positive and negative roots into consideration
because
(a+b)^2=a^2+2ab+b^2 and
(a-b)^2=a^2-2ab+b^2

see each

first one
-70=2(9)(4)
-70=72
false

second
-90=2(8)(5)
-90=80
false

third
-72=(9)(4)
-72=72
false
but, the last one could be negative
(9x-4)^2 is factor
that is the answer

the answer is 81x^2-72x+16

5 0

4 years ago

When estimating a square root, how do you find the numerator in your fraction of your estimation?

Tasya [4]

Answer:

To get your numerator you subtract the first two numbers, 63 - 49 = 14. That leaves you with 14 over 15 or . 93. Since the square root of 63 is higher than 7 but less than 8 your whole number is 7

4 0

3 years ago

A stone has a mass of

weqwewe [10]

To find the density of the stone divide the mass by the volume:

Density of stone = 100 grams / 10 ml = 10g/ml

Since the density of the stone is more than the density of the water, it will sink.

4 0

3 years ago

Read 2 more answers

What is the volume of the cone below? ):

svetoff [14.1K]

Answer:

A. 112π units³

General Formulas and Concepts:

Symbols

π (pi) ≈ 3.14

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Geometry

Volume of a Cone Formula: $\displaystyle V = \frac{1}{3} \pi r^2h$

r is radius
h is height

Step-by-step explanation:

Step 1: Define

Radius r = 4

Height h = 21

Step 2: Find Volume

Substitute in variables [Volume of a Cone Formula]: $\displaystyle V = \frac{1}{3} \pi (4)^2(21)$
Evaluate exponents: $\displaystyle V = \frac{1}{3} \pi (16)(21)$
Multiply: $\displaystyle V = \frac{16 \pi}{3}(21)$
Multiply: $\displaystyle V = 16 \pi \cdot 7$
Multiply: $\displaystyle V = 112 \pi$

8 0

3 years ago

What does 1/2 +1/3 equal

natita [175]

Answer:

Step-by-step explanation

5/6:

3 0

3 years ago

Read 2 more answers