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2 years ago

PLS HELP WILL GIVE BRANLIEST

Mathematics

1 answer:

AnnZ [28]2 years ago

3 0

Answer:

she took 13 classes that were worth 3 credits

Step-by-step explanation:

well we know that some of the classes are worth 3 and some are worth 4 and that all of these together = 59 so your first equation would be

3x+4y=59

x would be the number of classes worth 3 credits and y would be the number of classes worth 4 credits.

then it says the total number of classes that they took was 18 so we know that

x + y =18.

you want to solve for the number of 3 credit classes so lets go ahead and get rid of the y values. SO you need you multiply the x+y equation by 4

4x+4y=72

then subtract 4x+4y=72 from 3x+4y=59 to get

-x = -13

and then x is a negative so you need to divide -1 from both sides and you get that she took 13 classes that were worth 3 credits.

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The average weight of a newborn panda is 0.2, or 2/10 pound. Between what two integers is the weight of a newborn panda?

sweet-ann [11.9K]

Answer:

$\frac{2}{10}$ lies between 0 and 1.

Step-by-step explanation:

We must have in mind that given average weight of a newborn panda is a non-integer rational number, such that lies between two integer rational number. In other words, this number must satisfy the following condition:

$n < \frac{a}{b} < n +1$ , $n, a, b \in \mathbb{N}_{O}$

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Which is now developed mathematically to deduce a useful expression to find integers:

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4) $(n\cdot b)\cdot b^{-1} < a\cdot b^{-1}< [(n+1)\cdot b] \cdot b^{-1}$ Commutative, Associative and Distributive properties.

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If we know that $a = 2$ and $b = 10$ , the following inequation is formed:

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3 years ago

Math question need help with substation please?

Juliette [100K]

2 solutions

X= 16

X=49

Step-by-step explanation:

original equation

x-11√x+28 = 0

Isolate

-11√x = -x-28+0

Tidy up

11√x = x+28

Raise both sides to the second power

(11√x)2 = (x+28)2

After squaring

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Plug in 49 for x

11√(49) = (49)+28

Simplify

11√49 = 77

Solution checks !!

Solution is:

x = 49

Plug in 16 for x

11√(16) = (16)+28

Simplify

11√16 = 44

Solution checks !!

Solution is:

x = 16

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3 years ago

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Step-by-step explanation:

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