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tester [92]
3 years ago
12

Solve x2 + 2x =1 for x by completing the square.

Mathematics
1 answer:
Inga [223]3 years ago
5 0
The answer should be (x+1)^2 - 2
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A delivery truck is transporting boxes of two sizes: large and small. the combined weight of a large box and a small box is 60 p
sdas [7]

Let a = weight of large box in pounds

Let b = weight of small box in pounds

(1) 65a + 70b=4000

(2) a+b=60

Now we can simultaneously solve these equations.

a = 60 - b. Hence 65(60 - b) + 70b = 4000 So 3900 + 5b = 4000 and 100 = 5b hence b = 20.

SImilarly a = 40. Now we can verify too by putting in the calculated values.

5 0
3 years ago
Find an equation in standard form for the ellipse that satisfies the given conditions. Major axis length 10 on y-axis minor axis
Helen [10]
The answe might be e= 10\16
3 0
3 years ago
How do you round 2.8497 × 10^3 and 349.69 to 3 significant figures?
Kobotan [32]

Your answer for rounding 2.8497 x 10^3 is correct: 2.85 x 10^3.

350.0 is not correct because it has 4 sig figs. The proper rounding would be simply 350. with not additional zeros.

6 0
3 years ago
Please help solve!!<br> -5|x|+4=14
eduard

Answer:

2

Step-by-step explanation:

|x| means absolute value

|x| means if x is positive or negative, its still positive

-5|x|+4=14

-5|x|=10

|x|= -2

answer is 2

3 0
1 year ago
Read 2 more answers
How do i show my working when trying to work out 3 1/3 divided by 4?
PolarNik [594]

Answer:

5/6

Step-by-step explanation:

When dividing fractions, we use a rule where we keep the first number, change the sign, and flip the second number.

3 1/3 must be converted to an improper fraction before we can do this, though.

3 1/3 is 10/3 because we multiply 3 by the denominator, also 3, and then add one, so 10/3.

Now we can divide. Remember 4 is the same thing as 4/1

10/3 ÷ 4/1

Keep the first fraction the same, change the division sign into a multiplication sign, and divide by flip the second fraction.

It ends up looking like 10/3 x 1/4

Multiply: 10 x 1 and 3 x 4

It's 10/12, but we can simplify that by dividing both the top and the bottom by 2.

The final answer is 5/6

6 0
2 years ago
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