2 years ago

- 5+ (-4) = ? Can you guys please help me

Mathematics

1 answer:

Reika [66]2 years ago

4 0

-9 because a negative plus a negative is a negative so -5+-4 or -5-4 is -9

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Solve the equation (linear equation)<br><br> <img src="https://tex.z-dn.net/?f=%28%5Cfrac%7B16%7D%7B9%7D%29%20%5E%7B2x%20%2B5%7D

nignag [31]

Answer: $x=-\frac{3}{5}$

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:

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

You can rewrite 16 and 9 as following:

16=4²

9=3²

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

$(\frac{4^2}{3^2})^{(2x+5)}=(\frac{3}{4})^{(x-7)}\\\\(\frac{3^2}{4^2})^{-(2x+5)}=(\frac{3}{4})^{(x-7)}\\\\(\frac{3}{4})^{-2(2x+5)}=(\frac{3}{4})^{(x-7)}$

As the base are equal, then:

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

Solve for x:

$-2(2x+5)=x-7\\-4x-10=x-7\\-4x-x=-7+10\\-5x=3\\x=-\frac{3}{5}$

6 0

3 years ago

What is the opposite value of -(-9) ?

Alex787 [66]

Answer:

Step-by-step explanation:

two negatives make a positve

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3 years ago

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Gemiola [76]

2 mph is the speed that he is walking

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3 years ago

A parallelogram has two 19-inch sides and two 23-inch sides. what is the range of possible lengths for the diagonals of this par

JulijaS [17]

Answer:

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Step-by-step explanation:

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2 years ago

Question

Kitty [74]

Answer:

160 ft²

Step-by-step explanation:

The width is 40% of the length, so is ...

0.40 × 20 ft = 8 ft

The area is the product of length and width:

A = LW

A = (20 ft)(8 ft) = 160 ft²

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2 years ago