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eimsori [14]
2 years ago
15

Can someone help? will mark brainlest

Mathematics
2 answers:
Crank2 years ago
8 0
I need help my self lol XD
galina1969 [7]2 years ago
7 0

Answer:

x=33

Step-by-step explanation:

(x+20)+(4x-5)=180

5x+15=180

5x=165

x=33

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Kate can mow lawns at a constant rate of 4/5 lawns per hour. How many lawns can Kate mow in 20 hours?
weqwewe [10]

Answer:

16 lawns

Step-by-step explanation:

set up a proportion:

(4/5 ÷ 1) = (x÷20)

cross-multiply:

5x = 80

x = 16

8 0
3 years ago
Work out the value of 23 - 4b. When b = 3
Serggg [28]

Answer:

11

Step-by-step explanation:

Substitute 3 for b

23 - 4(3)

Multiply 4(3) = 12

23 - 12

Subtract

23 - 12 = 11

8 0
3 years ago
Read 2 more answers
Solve the following equation. X cubed minus 6X squared plus 6X equals zero
anyanavicka [17]

We have to solve this equation:

x^3-6x^2+6x=0

Third degree polynomials like this one are not easily solved, but this one has a root at x = 0. The let us factorize this polynomial as x times a second degree polynomial:

\begin{gathered} x^3-6x^2+6x=0 \\ x(x^2-6x+6)=0 \end{gathered}

Now we can find the roots of the quadratic polynomial as:

\begin{gathered} x=\frac{-(-6)\pm\sqrt[]{(-6)^2-4\cdot1\cdot6}}{2\cdot1} \\ x=\frac{6\pm\sqrt[]{36-24}}{2} \\ x=\frac{6\pm\sqrt[]{12}}{2} \\ x=\frac{6\pm\sqrt[]{4\cdot3}}{2} \\ x=\frac{6\pm2\sqrt[]{3}}{2} \\ x=3\pm\sqrt[]{3} \\ x_1=3-\sqrt[]{3} \\ x_2=3+\sqrt[]{3} \end{gathered}

Then, the solutions to the equation are:

x = 0

x = 3 - √3

x = 3 + √3

4 0
1 year ago
Help number 16 sos please
natta225 [31]
The answer is 0.4722. I hope this helps :)
5 0
3 years ago
The hypotenuse in the right triangle below is TR<br> True or False
julsineya [31]

the answer is false the hypotenuse is the one across from the right angle



4 0
3 years ago
Read 2 more answers
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