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tester [92]
3 years ago
10

An equation is shown below:

Mathematics
2 answers:
Karo-lina-s [1.5K]3 years ago
7 0

Original Equation.

5(2x - 8) + 15 = -15

First do what is in the parenthesis.

2 x 1 = 2

2 - 8 = -6

5(-6) + 15 = -15

Multiply 5 x -6 to get -30

-30 + 15 = -15

add 15 + -30 to get -15

-15

x = 1

Hope This Helps!

Can I get Brainliest?

DanielleElmas [232]3 years ago
5 0
X is 1.

first, you distribute the 5 into the parentheses.
 5(2x-8)+15=-15 becomes 10x-40+15=-15

then you calculate the sum
10x-40+15=-15 becomes 10x-25=-15

after that you move the constant to the right of the equal sign and change the sign (ex negative becomes positive number)
10x-25=-15 becomes 10x=-15+25

next, you add the constants
10x=-15+25 becomes 10x=10

lastly, you divide the numbers.
10x=10 becomes 1

so x=1



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How many liter of 15% weed killer mixture must be added to 5 liters of 10% weedkiller mixture to make 12% weed killer mixture?
finlep [7]

Answer: 3 1/3 liter

Brainliest? <3

let x equal the number of liters of 15% weedkiller.

your equation is .15 * x + .10 * 5 = .12 * (x + 5)

simplify to get .15 * x + .10 * 5 = .12 * x + .12 * 5

simplify further to get .15 * x + .5 = .12 * x + .6

subtract .12 * x from both sides and subtract .5 from both sides and simplify to get .03 * x = .1

divide both sides by .03 to get x = .1 / .03 = 3.333333333 rounded to 9 decimal digits.

you would need 3.333333333 liters of 15% solution to be added to 5 liters of 10% solution to get 8.333333333 liters of 12% solution.

.15 * 3.333333333 = .5

.10 * 5 = .5

.5 + .5 = 1

5 + 3.333333333 = 8.333333333

1 divided by 8.333333333 = .12 which is equal to 12%.

4 0
3 years ago
A circular piece of wood has a circumference of exactly 60.5 inches. Which measurement is closest to the radius, in inches, of t
DochEvi [55]

Answer:

the answer is 95.0 i took the quiz Yesturday.

Step-by-step explanation:

3 0
3 years ago
Consider △ABC. Triangle A B C is shown. Angle B C A is a right angle. The length of hypotenuse A B is 13, the length of B C is 1
bija089 [108]

Answer:

<em>22.62°</em>

Step-by-step explanation:

Considering △ABC.  If angle B C A is a right angle, then;

m<BCA = 90 degrees

Given also

AB = 13

BC = 12

AC = 5.

According to SOH, CAH TOA;

Sin <B = AC/AB

Cos <B = BC/AB

Substitute the given values

Sin B = 5/13

B = arcsin(5/13)

B = 22.62

Cos B = 12/13

B = arccos (12/13)

B =22.62

<em>Hence the angles that make sinB = cosB is 22.62°</em>

6 0
3 years ago
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Colt1911 [192]

Answer:

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Step-by-step explanation:

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3 years ago
Choose yes or no to tell if the fraction 2/9 will make each equation true
zmey [24]

Answer:

yes

Step-by-step explanation:

to see if 2/9 will make each equation true, you replace 'x' with 2/9, so let us do just that-

81*2/9=18

900*2/9=200

72*2/9=16

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now, seeing as how every answer we've gotten matches the answers of the algebraic equations, the answer is yes 2/9 does make each equation true

good luck :)

i hope this helps

brainliest would be highly appreciated

have a nice day!

5 0
3 years ago
Read 2 more answers
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