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3 years ago

MATH HELP PLEASE!!

Mathematics

1 answer:

Marat540 [252]3 years ago

8 0

Answer:

Step-by-step explanation:

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Simplify

denis23 [38]

Hello!

Answer:

1. =-6

2. =39

3. =-603

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Explanation: This question's it's about the order of operations. It stands for p-parenthesis, e-exponents, m-multiply, d-divide, a-add, and s-subtract. It can also go left to right. (PEMDAS)

1. -4(3-1)+2

Do parenthesis first.

$(3-1)=2$

$-4*2+2$

Then do multiply left to right.

$-4*2=-8$

Add left to right.

$-8+2$

$8-2=6$

*Answer should be have negative sign.*

Answer: → $\boxed{=-6}$

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2. 3⋅[(30−8)÷2+2]

Do parenthesis first.

$(30-8)=22$

$22/2+2$

Then divide left to right.

$22/2=11$

Add left to right.

$11+2=13$

Multiply left to right.

$3*13=39$

*Answer should be have positive sign.*

Answer: → $\boxed{=39}$

_____________________________________________________

3. 14(1-23)2+13

Do parenthesis first.

$(1-23)=-22$

$14(-22)*2+13$

Then, you multiply left to right.

$14(-22)=-308$

$-308*2=-616$

Add/subtract left to right.

$-616+13$

$616-13=603$

*The answer must be have a negative sign*

Answer: → $\boxed{=-603}$

____________________________________________________________

Hope this helps!

Thank you!

Have a great day!

-Charlie

7 0

2 years ago

A driver who drives at a speed of r mph for t hr will travel a distance d mi given by dequalsrt mi. How far will a driver travel

liubo4ka [24]

Answer:

At a speed of 57 mph for 8 hr a driver will travel 456 mi

Step-by-step explanation:

Here we have a summary of the letters for each variable:

Speed ---> r (in units of mph)

Time ---> t (in units of hr)

Distance ---> d (in units of mi)

These three variables are related by the next formula:

d = rt

In the data they give to you: 57 mph and 8 hr, they are telling you the r and the t, respectively:

r = 57 mph

t = 8 hr

The only thing you have to do is replace the values:

d = rt ----> d = 57 mph x 8 hr

d = 456 mi

5 0

3 years ago

Which postulate or theorem proves that these two triangles are congruent?

Olenka [21]

Answer:

SAS congruence postulate. sweetheart.

Step-by-step explanation:

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2 years ago

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the diameter of one species of bacteria is shown. bonnie approximates this measure as 3 x 10^-11 meter. is she correct? explain.

stich3 [128]

Answer:

Step-by-step explanation:

No picture of the bacteria provided, but according to some text books its arround 0.2 - 2m in micrometer measurement, so 3 x 10^-11 is far more smaller than the range.

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2 years ago

Ratio equivalent to 1:3

Margaret [11]

2:6

3:9

4:12

These are all equivilant

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3 years ago

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