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3 years ago

4x - 5y = -28-3x - 2y = 10

Mathematics

1 answer:

kozerog [31]3 years ago

8 0

Answer:

y=-4/23

im not sure i didn't check (might be wrong)

Step-by-step explanation:

4x - 5y = -28

-3x - 2y = 10

then make x the same

12x-15y=-84

-12x-8y=80

then its left with

-23y=-4

y=-4/23

find x by entering y into -3x - 2y = 10 and solving

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Solve the equation (linear equation)<br><br> <img src="https://tex.z-dn.net/?f=8%5E%7B2x%2B7%7D%20%3D%20%28%5Cfrac%7B1%7D%7B32%7

Minchanka [31]

Answer: $x=-1$

Step-by-step explanation:

By the negative exponent rule, you have that:

$(\frac{1}{a})^n=a^{-n}$

By the exponents properties, you know that:

$(m^n)^l=m^{(nl)}$

Therefore, you can rewrite the left side of the equation has following:

$(\frac{1}{8})^{-(2x+7)}=(\frac{1}{32})^{3x}$

Descompose 32 and 8 into its prime factors:

$32=2*2*2*2*2=2^5\\8=2*2*2=2^3$

Rewrite:

$(\frac{1}{2^3})^{-(2x+7)}=(\frac{1}{2^5})^{3x}$

Then:

$(\frac{1}{2})^{-3(2x+7)}=(\frac{1}{2})^{5(3x)}$

As the base are equal, then:

$-3(2x+7)=5(3x)$

Solve for x:

$-6x-21=15x\\-21=15x+6x\\-21=21x\\x=-1$

8 0

3 years ago

Please help. I don’t know the answer.

atroni [7]

(y^12)/5

9/45=1/5
x^5/x^5=1
y^16/y^4=y^12

4 0

3 years ago

Read 2 more answers

If a TV cost $3960.00 and toes on sale during the following week with a 25% discount, what will be the total cost of the TV? but

Free_Kalibri [48]

we have the price of TV is $3960.if we round off to the nearest tens we get same 3960 because we have 0 at the end which means lesser than 5 so 60 will be the nearest ten.

discount = $\frac{25}{100} *3960=990$

so $990 will be the discount.

and the cost of TV after discount is $3960-990=$2970$

7 0

3 years ago

HELP ME PLEASEEEEEE!!!!

agasfer [191]

The answer will be
15m+10

6 0

3 years ago

WILL MARK BRAINLIEST HELP ASAP ASAP

Mrac [35]

Answer:

not possible

Step-by-step explanation:

8 0

3 years ago

4x - 5y = -28-3x - 2y = 10​

4x - 5y = -28-3x - 2y = 10