All categories

3 years ago

Please answer the questions with full working and explantation.

Mathematics

1 answer:

kow [346]3 years ago

8 0

Answer:

x = 4

Step-by-step explanation:

Given

$\frac{1}{x+5}$ = $\frac{1}{4x-7}$ ( cross- multiply )

4x - 7 = x + 5 ( subtract x from both sides )

3x - 7 = 5 ( add 7 to both sides )

3x = 12 ( divide both sides by 3 )

x = 4

You might be interested in

I need help with question 11!!!!

lakkis [162]

Answer:

Step-by-step explanation:

Pythagorean theorum: 5^2 +s^2 = 15^2 so 25 + s^2 =225

s^2 =200 so s = square root of 200 which is 10 times the square root of 2. So the first answer is right

4 0

3 years ago

A scientist cools some water at a constant rate. the graph and table show how the temperature of the water changes with time.

irina1246 [14]

Answer:

Step-by-step explanation:

The easiest way to determine this is to realize that time is the independent variable (n) and temperature is the dependent variable (a).

From the table, we can plug in the two points (n) into n of each equation and see if that equals the temperature values (a).

A little thinking would get us to plug the numbers in C first.

$a(n)=46-(n-1)*4\\46-(5-1)*4=30$

Works!!

Now, second number:

$a(n)=46-(n-1)*4\\46-(6-1)*4=26$

Works!!

Hence, C is the correct answer.

6 0

3 years ago

Read 2 more answers

PLZZZ HELP! AC 7TH MATH

slega [8]

Answer: It 6 your wellcome :)

4 0

3 years ago

Read 2 more answers

If one of the variables in a linear inequality in two variables is not presented because its coefficient is understood to be 0,

Korolek [52]

True

_____
You need to test for some combination of the variables present. If one is missing, you can only test a value of the other.

4 0

3 years ago

Can’t figure out number 35 plz help This is science btw

Novay_Z [31]

Answer:

it is valley

Step-by-step explanation:

it is a valley because the lower numbers in the middle suggest that it gets higher towards the outer layers which means that it goes down in the middle like a hole and a hole is like a valley. :) hope that makes sense

8 0

3 years ago