URGENT These are just 3 easy fill in the blank math problems.

Mathematics

2 answers:

elena-14-01-66 [18.8K]3 years ago

6 0

Answer:

1. minus

2. srry i dunno this one

3. minus (again)

kirill [66]3 years ago

3 0

Answer:

Same signs add and keep different signs subtract take the sign of the higher number then youll be exact! :)

Step-by-step explanation:

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Fay is buying a new washing machine which is on sale for $1479 she can either pay the entire amount at the time of purchase or m

Novay_Z [31]

Answer:$271

Step-by-step explanation:

$125x12= 1500+250=1750

1750-1479=271

5 0

4 years ago

50 7 x + 22 x=? Please help

elena55 [62]

X= 4

both of the angles are the same degrees so you figure out the difference between 50 and 22 and take that divided by 7 to get x

50-22

28/7

=4

3 0

2 years ago

The diameter of cold virus cell is about 3x10-9 meter,and the diameter of a streptoccus bacterium cell is about 9x10-7 meter. Wh

Archy [21]

Here we need to compare the orders of magnitude of two measures.

We will see that the bacteria is 300 times larger than the virus.

We know that:

The diameter of the virus-cell is:

$D_v = 3 \cdot 10^{-9} m$

The diameter of the bacteria cell is:

$D_b = 9 \cdot 10^{-7} m$

So, to compare them, first notice that both are in the same units, meters, so we only need to compare the numbers.

Is common sense to identify the one with the largest exponent as the largest number, and the largest exponent is -7, thus the bacteria should be the larger one.

But let's prove this with math, remember the property:

$\frac{a^n}{a^m} = a^{n - m}$

Let's take the quotient between the diameters and see what we get, I will use the diameter of the bacteria in the numerator, thus if the quotient is larger than 1, it would mean that the bacteria is greater and by how much.

$quotient = \frac{ 9 \cdot 10^{-7} m}{ 3 \cdot 10^{-9} m} = \frac{9}{3} \cdot 10^{-7 + 9}\\\\= 3*10^2$