Let x be the 1st number
x + 9 be the second number

Equation:
x + x+9 = 171

Solution:
2x + 9 = 171
2x = 171 - 9
2x = 162
x = 81
x + 9 = 90

81 + 90 = 171

4 0

3 years ago

Graph F(x)=x^2+4 to its function

Marizza181 [45]

Answer:

vajahs j8fejj

Step-by-step explanation:

Horne if hi ackee on on the or you don't have a 8th 9

3 0

3 years ago

Read 2 more answers

Pre cal help??????????

klasskru [66]

I believe it's the last one, but it's a matrix not a vector as the question asks

3 0

3 years ago

M is directly proportional to r cubed when r = 4, m = 160. Find the value of r when m = 540

Anarel [89]

Answer:

r = 6

Step-by-step explanation:

Given that M is directly proportional to r³ then the equation relating them is

M = kr³ ← k is the constant of proportionality

To find k use the condition r = 4 when M = 160

k = $\frac{M}{r^3}$ = $\frac{160}{64}$ = 2.5, so

M = 2.5r³ ← equation of proportionality

When M = 540, then

540 = 2.5 r³ ( divide both sides by 2.5 )

216 = r³ ( take the cube root of both sides )

r = $\sqrt[3]{216}$ = 6

5 0

3 years ago