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djyliett [7]
3 years ago
11

Looking for an algebraic equAtion answer.. 2x + y = 1 4x - 2y = 6 Can you help?

Mathematics
1 answer:
Sergio [31]3 years ago
4 0
X=1and y=−1 Your welcome
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Find the area of a circle whose circumference is 18.84.
ivann1987 [24]

Answer:

310.23

Step-by-step explanation:

circumference is radius * 2

to get radius from circumference, divide circumference by 2

18.84 / 2 =9.42

area for circle:

pi * r^2

3.14 * 9.94^2

3.14 * 98.8

310.23

7 0
1 year ago
If 2x^3=y, then log y equals
Svetllana [295]

Answer:

log 2 + 3 logx

Step-by-step explanation:

log 2x^3

log2+logx^3

log^2+3logx

4 0
2 years ago
Can someone please check this?
hodyreva [135]
That’s right cuz there’s 2 cubes in height and if one cube is 4ft then 2 would be 8ft
6 0
9 months ago
Use the Theorem of Pappus to find the volume of the solid formed by revolving the region bounded by the graphs ofy=x, y=10, and
Pepsi [2]

Answer:

C) 2094.40

nearest answer.

Step-by-step explanation:

Since the given region is bounded by y = x, y = 10 and x = 0

⇒ 0 ≤ y ≤ 10

Radius and Height are 'y'

∴ The required volume

= ∫₀¹⁰2π(radius)(height)dy

= ∫₀¹⁰2π (y) (y) dy

= ∫₀¹⁰2π y² dy

= 2π ∫₀¹⁰ y² dy

Integrate y

= 2\pi [\frac{y^3}{3}]_0^{10}

= 2\pi [\frac{10^3}{3} - 0]

= \frac{2000}{3} \pi

where π is 3.142

= 2,094.66

5 0
3 years ago
The sum of the digits of a two-digit positive integer is seven. Subtracting 45 from this integer yields another two-digit intege
Firdavs [7]

Answer:

61

Step-by-step explanation:

Reversing the digits of a 2-digit number changes its value by a multiple of 9. The multiple is the difference between the digits. Here, the value is changed by 45 = 5·9, so the difference between the two digits is 5. We are told their sum is 7, so the digits must be 1 and 6. The larger digit is in the tens place to make this problem work out right.

The original integer is 61.

_____

Solution using a single variable

Let t represent the original digit that is in the 10s place. Then 7-t is the units digit and the value of the original number is ...

10t +(7-t) = 9t +7

The value of the number with the digits reversed is ...

10(7-t) +t = 70-9t

The difference between these two numbers is said to be 45, so we have ...

(9t +7) -(70 -9t) = 45

18t -63 = 45

18t = 108

108/18 = t = 6

The tens digit is 6, so the units digit is 7-6=1. The original number is 61.

_____

Solution using two variables

Let t and u represent the tens and units digits of the number respectively. Then we have ...

t + u = 7

(10t+u) -(10u+t) = 45

The second equation simplifies to ...

9t -9u = 45

9(t -u) = 45 . . . . . . the relationship between the digits described above

t -u = 5 . . . . . . . . . divide by 9

Now, we can add this equation to the one expressing the sum of digits:

(t +u) +(t -u) = (7) +(5)

2t = 12

t = 6

u = 7-t = 1 . . . . . from the first equation (t+u=7)

The original number is 61.

3 0
3 years ago
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