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galben [10]
3 years ago
8

Without the use of a calculator, calculate 77^2−23^2.

Mathematics
2 answers:
umka2103 [35]3 years ago
7 0

Answer:

5400

Step-by-step explanation:

77x77=5929

23x23=529

5929-529

5400

stepan [7]3 years ago
4 0

Answer:

5400

Step-by-step explanation:

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100 points
Snezhnost [94]

Answer: 28\sqrt 3

Step-by-step explanation:

8 x 14 x 21 = 2352, so:

√8⋅√14⋅√21 = √2352

√2352 in simplest form is 28√3

I hope this helps!

6 0
2 years ago
A train travels 4.4 miles in
Ugo [173]

Answer:

63.8 miles

Step-by-step explanation:

If the train travels 4.4 miles in 4 minutes, then you have to divide 4.4/4 to find the miles the train travels per minute.

4.4/4 = 1.1

So, since the train travels 1.1 miles per minute, and we want to know how fast it travels in 58 minutes, we have to multiply 1.1 by 58. Since 1.1 is a decimal number, we have to multiply both sides by 10 to get 11x580.

11x580 = 5800+ 580 = 6380

Since we multiplied both numbers by 10, we have to divide 6380 by 100.

6380/100 = 63.8

So, the train travels 63.8 miles in 58 minutes.

3 0
3 years ago
THE ANSWER I PUT IS JUST A GUESS, IF IT ISN'T THE ANSWER PLEASE TELL ME WHAT IT IS I BEG YOU ​
Anna [14]

Answer:

the first one

Step-by-step explanation:

can you help me with my question

6 0
3 years ago
Read 2 more answers
Which equation represents a linear function? A) y = |x| B) y = x2 C) y = -3x3 D) y = 1 4 x
Step2247 [10]
Linear means the highest exponent on the placholder is 1
it is also just a straight line

y=|x| is like y=(√x)², it is 2 straight lines

B. y=x², exponent is 2 so no

C. y=-3x³, exponent is 3, so no

D. y=1/4x, yep


D is the answer
5 0
3 years ago
Read 2 more answers
How to draw a model of 3/10
-BARSIC- [3]
Draw a pizza with 10 slices and shade 3 slices
4 0
3 years ago
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