3 years ago

Please help thank you! 15 points

Mathematics

1 answer:

ahrayia [7]3 years ago

8 0

The correct ans is no 2

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The average mass of a giraffe is approximately 1 × 10^3 kilograms. The average mass of a blue whale is approximately 2 × 10^6 ki

Jlenok [28]

Giraffe = 1,000 kg
Whale = 2,000,000 kg

Whale has 2,000 times the mass.

7 0

2 years ago

If we are given x such that 25^x-9^y=18 and 5^x-3^y=3, compute 5^x+3^y.

leonid [27]

25 = 5*5 and 9 = 3*3, which we can exploit to write

$25^x-9^y=(5^2)^x-(3^2)^y=5^{2x}-3^{2y}=(5^x)^2-(3^y)^2$

so that this expression is actually a difference of squares. We can factorize this to get

$(5^x-3^y)(5^x+3^y)=18$

and given that $5^x-3^y=3$ , we divide both sides by this to get

$5^x+3^y=\dfrac{18}3=\boxed{6}$

7 0

2 years ago

HELP! 9 is what percent of 100 (need to show how I got my answer)

exis [7]

Answer:

Step-by-step explanation:

We can start by changing this number to a fraction.

$\frac{9}{100}$

We know that 100 is a whole percentage

Therfore, we would get 9%

6 0

2 years ago

Read 2 more answers

Simplify the following monomials pls

velikii [3]

Answer:

1.) $a^4b$

2.) $p^3q^4$

3.) $2n^4$ $2n^4$

4.) $5xy^2z$

5.) $2a^3b^5$

I hope this helps:

4 0

2 years ago

One dollar and eighty-seven cents. That was all. And sixty cents of it was in pennies."

gladu [14]

To model the scenario, the following will be the numerical coefficients for the variables: 0.05 for nickels (5 cents), 0.10 for dime (10 cents) and 0.25 for quaters (25 cents). Thus the model/equation is, $1.87 = 0.25q + 0.10d + 0.05n + 60.

3 0

2 years ago