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larisa86 [58]
3 years ago
8

PLEASEEE HELP!

Mathematics
1 answer:
Andrews [41]3 years ago
7 0

Answer:

4

Step-by-step explanation:

120/30=4

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Anna took a job that paid $200 the first week. She was guaranteed a raise of 5% each week.
Mila [183]
5% of 200= 10 dollars
10*8= 80 
total after 8 weeks= $280
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4 years ago
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Which of the following expressions is the inverse of the function y=3x+4
zubka84 [21]
To find the inverse of a function, we swap x and y then solve for y
So with this, we take y = 3x + 4 and make it x = 3y + 4. Now we solve for y
x = 3y + 4
Subtract 4 from both sides
x - 4 = 3y
Divide both sides by 3
\frac{x-4}{3} =y
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3 years ago
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A triangle has vertices at A(-2,3), B(2,-2), and C(-2,-2). What is the area of the triangle?
Softa [21]

Answer:

The area of the given triangle ABC is 10 units.

Step-by-step explanation:

we have the area of the triangle when points are given is given by the relation

Area of triangle=

\frac{1}{2} {x1 \times (y2 - y3) + x2 \times (y3 - y1) + x3 \times (y1 - y2)}

and hence putting the Value

triangle = 1/2*( -2*(-2+2)+2*(-2-3)+(-2)*(3+2))

= 1/2*(0+2*(-5)+(-2)*5)

= 1/2*(-10-10)

= 1/2*(-20)

= (-10) units

Since area of the triangle is always positive, we neglect the minus sign and take 10 units as its area.

6 0
4 years ago
Mrs. Hellerud bought 18.84 feet of fencing to go around her tree in her front yard. She wants to know the area to find how big o
Lemur [1.5K]

the fencing is the perimeter to the tree, then we can use the formula of the perimeter of a circle to replace this value

\begin{gathered} P=2\times\pi\times r \\ 18.84=2\times\pi\times r \end{gathered}

now we can solve r from the formula to know the radious

\frac{18.84}{2\times\pi}=r

we can use 3.14 to pi

\begin{gathered} r=\frac{18.84}{2\times3.14} \\  \\ r=3 \end{gathered}

the value of the radio is 3 feet

now we can use the formula of the area of the circle to calculate the total area

A=\pi\times r^2

and replace the known value of the radious and pi

\begin{gathered} A=3.14\times3^2 \\  \\ A=28.26 \end{gathered}

<em>the area is 28.26 square feet</em>

5 0
2 years ago
(5n-1)(n+1)=0 factory
gavmur [86]

Answer:

5n^2+(4n)-1

Step-by-step explanation:

(5n-1)(n+1)=0

Lets find <em>n.</em>

(5n-1)(n+1)=0

FOIL it.

5n^2+5n-1n-1

Add/Substract similar factors

5n^2+(5n-1n)-1

5n^2+(4n)-1

Thats your answer.

3 0
3 years ago
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