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3 years ago

7

The sentence 3+(5+2)=(5+2)+3 illustrates

1 answer:

valentina_108 [34]3 years ago

4 0

C is the answer over all

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A train is 300 meters long. A tunnel is 2900 meters long. The train travels at 600 meters per min. How long is the time between

sattari [20]

ANSWER: 5 minutes 20 seconds

WORK: entire train to get out of tunnel - 2900+300 = 3200 meters till it's out

at 600 meters per minute ...3200/600 = 5 1/3 = 1/3 of a minutes is 20 seconds

Hope this helps brainliest and rate/thanks helps!

8 0

3 years ago

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How do u solve 63=-9d?

Len [333]

-9d = 63
you divide both side by -9

sooo...

d = -7

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3 years ago

Which shows the expression below simplified? 0.00028 ÷ (7 × 10-4)

Katyanochek1 [597]

$0.\underbrace{00028}_{\rightarrow5places}=28\times10^{-5}\\\\0.00028:(7\times10^{-4})=\dfrac{28\times10^{-5}}{7\times10^{-4}}=\dfrac{28}{7}\times\dfrac{10^{-5}}{10^{-4}}\\\\=4\times10^{-5-(-4)}=4\times10^{-5+4}=\huge\boxed{4\times10^{-1}}\leftarrow\boxed{b.}\\\\used\ \dfrac{a^n}{a^m}=a^{n-m}$

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3 years ago

Write the equation of the center (2,5) and passes through the point (8,5)

BARSIC [14]

Answer: varibles coffeeefishents exponets study then eat

Step-by-step explanation:

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3 years ago

What is the solution to the equation below. square root x - 6 = x - 12

lyudmila [28]

$\\ \rm\hookrightarrow \sqrt{x-6}=x-12$

$\\ \rm\hookrightarrow x-6=(x-12)^2$

$\\ \rm\hookrightarrow x-6=x^2-24x+144$

$\\ \rm\hookrightarrow x^2-25x+150=0$

$\\ \rm\hookrightarrow x^2-10x-15x+150=0$

$\\ \rm\hookrightarrow (x-10)(x-15)=0$

$\\ \rm\hookrightarrow x=15\:or \:10$

8 0

1 year ago

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