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Sphinxa [80]
3 years ago
8

Find the value of x that solves the system shown below. y = 5x 2x - y = 18

Mathematics
1 answer:
cestrela7 [59]3 years ago
7 0
Since 5x is equal to y.we can write 5x instead of y in the equation.and then solve the equation

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Mary estimated that it would take 3 hours to write a book report, but it actually took her 5 hours. What is the percent error fo
Eduardwww [97]

Answer:

The percent error is 40%.

Step-by-step explanation:

5 (actual time) - 3 (estimated time) = 2

2 divided by 5 (actual time) = 0.4

0.4 x 100 = 40%

6 0
3 years ago
Write 8.92x10^9 in standard notation.
Mandarinka [93]
8920000000.
Since the problem is asking for a positive 10^9 power, the final number with be greater than 8.92
7 0
3 years ago
Two sides of a triangle are equal in length and double the length of the shortest side. The perimeter of the triangle is 36 inch
chubhunter [2.5K]

Answer:

Two equal sides = 14.4 inches each

Shortest side = 7.2 inches

Step-by-step explanation:

a + b + c = 36

a = b

a = 2c

then:

c = a/2

a + a + a/2 = 36

2a + a/2 = 36

4a/2 + a/2 = 36

5a/2 = 36

a = 2*36/5

a = 72/5

a = 14.4

a = 2c

14.4 = 2*c

c = 14.4/2

c = 7.2

a = b

b = 14.4

Check:

14.4 + 14.4 + 7.2 = 36

3 0
3 years ago
A polynomial is to be constructed that will touch the x axis at most 7 times. What is the minimum degree of the polynomial?
tia_tia [17]
7 times, means 7 x intercepts, means 7th degree

answer is 7th degree
7 0
3 years ago
Find a factor of 3x^2- 16x - 12​
Greeley [361]

Answer:

x= -2/3 and 6

Step-by-step explanation:

3x²-16x-12

3x²-18x+2x-12

(3x²-18x)+(2x-12)

3x(x-6)+2(x-6)

(3x+2)(x-6)

x= -2/3 and 6

8 0
3 years ago
Read 2 more answers
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