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1 year ago

I NEED HELP PLEASEEEEE ASAPPPPPPP

Mathematics

1 answer:

Bingel [31]1 year ago

8 0

Answer:

7x+40=180

Step-by-step explanation:

(5x+40)+(2x)=180

7x+40=180

if you were to solve

subtract 40 from each side

7x=140

divide both sides by 7

x=20

check your answer

5(20)+40+2(20)=180

100+40+40=180

this is correct

hope this helps..and with future questions if you need to solve it

To find BCD

we know that C is 40 degrees and we know that triangle is also 180

we can also see that B is a right triangle or 90 degree

so 90+40+A=180

130+A=180

subtract 130 from 180

A=50

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Answer:

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3 years ago

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15. Suppose = 2 and = 3 and X and Y are independent random variables. According to the rules for variances, what is ? What is ?

GrogVix [38]

Answer:

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Step-by-step explanation:

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4 years ago

Find the side in of point a to point c

vladimir1956 [14]

Step 1:

Calculate the measure of angle ∠ABC

$\angle DBC+\angle ABC=180(\text{ sum of angles on a straight line)}$ $\angle ABC=65^0$ $\begin{gathered} \angle DBC+\angle ABC=180 \\ \angle DBC+65^0=180^0 \\ \angle DBC=180^0-65^0 \\ \angle DBC=115^0 \end{gathered}$

From the triangle in the question,

$a=10\operatorname{km},c=15\operatorname{km},B=115^0$

Step 2:

Calculate the value of AB using the cosine rule below

$b^2=a^2+c^2-2\times a\times c\times\cos B$

By substituting the values, we will have

$\begin{gathered} b^2=a^2+c^2-2\times a\times c\times\cos B \\ b^2=10^2+15^2-2\times10\times15\times\cos 115^0 \\ b^2=100+225-300\times(-0.4226) \\ b^2=325+126.78 \\ b^2=451.78 \\ \text{Square root both sides} \\ \sqrt[]{b^2}=\sqrt[]{451.78} \\ b=21.26\operatorname{km} \end{gathered}$

Hence,

The distance of point A to point C is = 21.26km

3 0

1 year ago

What is the solution to log 2(9x)-log base 2 3= 3

Crank

Answer:

8/3

Step-by-step explanation:

log(9x)base 2 -log (3) base 2=3

log(9x/3)base 2 =3

9x/3=2^3

3x=8

x=8/3

=2.7 to dp

7 0

3 years ago

using your calculator, find the money accumulated if i invested $65,000 at 7.3% interest for 10 years compounded continuously.

Ket [755]

This is for one year with annual compound

A = 65000(1 + .073/1)^1 
A = 69745 total 

thus, the money made is $4745 interes

3 0

3 years ago