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anzhelika [568]
3 years ago
12

Enter an equation that can be used to find x. (Picture below)

Mathematics
1 answer:
Levart [38]3 years ago
3 0

(2x+1)+89=180.  180 is the angle of a straight line.  Set your two known sides equal to 180 and solve for x if needed.

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Mario invested $6,000 in an account that pays 5% annual interest compounded annually how much will be there after 2.5 years
Liono4ka [1.6K]

Answer:

$48,000

Step-by-step explanation:

i = \frac{p \times r \times t}{100 }  \\ 6000 =  \frac{p \times 5 \times 2.5}{100 }  \\ 600000 =  12.5 \\ 48000

6 0
2 years ago
What is the sum of 20x^2-10x-30
ivann1987 [24]

Answer:

The sum of the roots is 0.5

Step-by-step explanation:

<u><em>The correct question is</em></u>

What is the sum of the roots of 20x^2-10x-30

we know that

In a quadratic equation of the form

ax^{2} +bx+c=0

The sum of the roots is equal to

-\frac{b} {a}

in this problem we have

20x^{2} -10x-30=0  

so

a=20\\b=-10\\c=-30

substitute

-\frac{(-10)} {20}=0.5

<u><em>Verify</em></u>

Find the roots of the quadratic equation

The formula to solve a quadratic equation is equal to

x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}

a=20\\b=-10\\c=-30

substitute

x=\frac{-(-10)\pm\sqrt{-10^{2}-4(20)(-30)}} {2(20)}

x=\frac{10\pm\sqrt{2,500}} {40}

x=\frac{10\pm50} {40}

x=\frac{10+50} {40}=1.5

x=\frac{10-50} {40}=-1

The roots are x=-1 and x=1.5

The sum of the roots are

-1+1.5=0.5 ----> is ok

5 0
3 years ago
Please answer the question in the picture
GarryVolchara [31]

Answer:

D) (x+2) (x+2)  

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
X + 2y = 13 <br> -x + y = 5
galben [10]

Answer:

x= 1 and y= 6

Step-by-step explanation:

3 0
3 years ago
If m 1 = 40, find the measure of 7
TEA [102]
M 7=280. you just multiply 7 by 40 to get your answer. i am pretty sure.
5 0
3 years ago
Read 2 more answers
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