All categories

2 years ago

If x+y = -10 and x-y = 2 what is the value of x

Mathematics

1 answer:

madam [21]2 years ago

5 0

Answer:

x= -4

Step-by-step explanation:

adding the two equations,

x+x+y-y=-10+2

2x= -8

x=-4

You might be interested in

Erika is working on solving the exponential equation 50x = 17; however, she is not quite sure where to start. using complete sen

Kryger [21]

Erika is working on solving the exponential equation 50^x = 17; The solution is x = 0.7242.

<h3>What is logarithm?</h3>

When you raise a number with an exponent, there comes a result.

Let's say you get

a^b = c

Then, you can write 'b' in terms of 'a' and 'c' using a logarithm as follows

$b = \log_a(c)$

'a' is called base of this log function. We say that 'b' is the logarithm of 'c' to base 'a'

Erika is working on solving the exponential equation 50^x = 17;

however, she is not quite sure where to start.

The equation is

$50^x = 17\\$

By taking the log both sides

$log_a b = x\\\\a_x = b$

By using the base formula

$log_0 y = \dfrac{logy}{log b}$

So, $log_{50} 17= x\\\\$

$x = \dfrac{log17}{log 50}$

x = 0.7242

Learn more about logarithm here:

brainly.com/question/20835449

#SPJ1

3 0

2 years ago

To find the amount of interest Jesse will pay to borrow money, you can use the formula I = PRT. I = interest; P = principal; R =

Cerrena [4.2K]

Answer: A $2000

Step-by-step explanation:

Interest = prt / 100

= 5000 x .08 x 5

= 2000

5 0

3 years ago

What equation of the line that has a slope of -4 and passes through the point (-2,-5)? Answer ASAP!!

Anna11 [10]

Answer:

Given points are ( -2 , -5 ) and slope ( m) = -4

Step-by-step explanation:

y - y1 = m ( x - x1)

y + 5 = -4 ( x + 2 )

y + 5 = -4x - 8

4x + y +5 + 8 = 0

4x + y +13 = 0 

y = -4x - 13

which is the required equation 

4 0

3 years ago

Area of a rectangle 12 by 10

Schach [20]

Answer:

120

Step-by-step explanation:

The area of a rectangle is its width multiplied by its length, which in this case is 12*10=120.

8 0

3 years ago

Read 2 more answers

the distance between bases on a youth baseball field is proportional to the distance between bases on a professional baseball fi

enyata [817]

(Pro) = (scale or proportion) * (Youth)
this formula could be used to find the difference in the fields. if they are directly proportional then it means that the fields are similar polygons.

4 0

3 years ago