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N76 [4]
3 years ago
8

4x^2-400=0 square roots and solving quadratics

Mathematics
1 answer:
posledela3 years ago
8 0

Answer:

x = ±10

Step-by-step explanation:

4x² - 400 = 0

Add 400 to both sides

4x² = 400

Divide both sides by 4

x² = 100

Take the square root of both sides

x = ±10

You might be interested in
Quincy says that 3 is a good estimate for 3.4 X 0.09, is he correct? Why?
lord [1]
<span>Quincy says that 3 is a good estimate for 3.4 X 0.09, is she correct? Why?
When we say estimates meaning it is not the exact answer but close to what is the exact.
Now, if Quincy estimated 3 as the product of 3.4 * .09, then let’s check if she has the correct estimates.
=> 3.4 estimates is 3
=> 0.09 estimates is 0.1
Now the answer is 0.3 and not 3.
Thus, Quincy’s estimate is wrong.</span>



4 0
3 years ago
Gente me ajudem prfvv em matemática
Tasya [4]

Answer:

Step-by-step explanation:

Trace a linha de 8cm, daí você vai dividir ela no meio, ou seja, no 4. Aí é só contar 2 cm para cada lado, que vai ser o 1, as pontas vão ser o 2. Tendeu? Daí é só marcar os pontos no -3/7(~-2,3), 1,6, 7/5(1,4), -1 e 0

6 0
2 years ago
Each day the sharks at an aquarium are each fed 12 pounds of fish for every 100 pounds of their body weight. If a shark at the a
Vitek1552 [10]

Answer:

40.8 lbs

Step-by-step explanation:

First find how many 100 pounds are in the 340 lbs shark.

340/100=3.4

The sharks are fed 12 lbs of fish for every 100 pounds of shark.

There are 3.4 hundred pounds in this shark.

3.4*12=40.8; 40.8 lbs

4 0
3 years ago
10 Points!! Please Help!
S_A_V [24]

Answer:

The answer is A.) R

R is in the correct correspondence with B.


4 0
3 years ago
Help me please 98 math
luda_lava [24]

Answer:

the least common denominator would have to be 77

Step-by-step explanation:

because the product of 11 and 7 equals 77 but there is nothing less than that that can actually be a COMMON denominator

for example: 7 can be multiplied by numbers to get these out comes //

7,14,21,28,35,42,49,56,63,70,77 and 77 is the only one that 11 can actually equal to that is common with 7

5 0
3 years ago
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