All categories

3 years ago

Fifteen less than twice a number is 53.solve 2n-15=53

2 answers:

6 0

2n-15=53
You need to get n by itself. To do that we need to simplify the left hand side of the equation. To do so, we move everything away from n. First add 15 to both sides to eliminate it on the left side.
2n-15+15=53+15
2n=68
next divide by 2 to solve for n
2n/2=68/2
n=34

vaieri [72.5K]3 years ago

5 0

First add 15 to both sides:

2n = 68

Then divide each side by two.

n = 34

You might be interested in

Find the domain and range of the relation<br> (-8,2),(6,-7),(-8,11),(10,5)

VARVARA [1.3K]

Answer:

domain:2,-7,11,5

range:-8,6,-8,10

to explain more the domain would be your independent variable (y) and the range would be your dependent variable (x)

hope I helped

5 0

3 years ago

Read 2 more answers

Mike has $6000 to invest. He invested part of his total into an account earning 6% interest and the rest in an account earning 1

lesya692 [45]

Answer:$4000 was invested into the account earning 6% interest.

$2000 was invested into the account earning 11% interest.

Step-by-step explanation:

Let x represent the amount invested into the account earning 6% interest.

Let y represent the amount invested into the account earning 11% interest.

Mike has $6000 to invest. He invested part of his total into an account earning 6% interest and the rest in an account earning 11% interest. This means that

x + y = 6000

The formula for simple interest is expressed as

I = PRT/100

Where

P represents the principal

R represents interest rate

T represents time in years

I = interest after t years

Considering the account earning 6% interest, the interest would be

I = (x × 6 × 1)/100 = 0.06x

Considering the account earning 11% interest, the interest would be

I = (x × 11 × 1)/100 = 0.11y

If at the end of the year, he earned $460.00 in interest, it means that

0.06x + 0.11y = 460 - - - - - - - - - - -1

Substituting x = 6000 - y into equation 1, it becomes

0.06(6000 - y) + 0.11y = 460

360 - 0.06y + 0.11y = 460

- 0.06y + 0.11y = 460 - 360

0.05y = 100

y = 100/0.05 = $2000

x = 6000 - y = 6000 - 2000

x = $4000

3 0

3 years ago

The mean temperature for the first 7 days in January was 3 °C.

irina1246 [14]

Answer:

Go and ask Google okay you say me like this.

4 0

3 years ago

Use x = 1 to identify the value of each expression.

timofeeve [1]

1; 0; and for the last one x^3 x=cubic root of 3

7 0

3 years ago

Which two values of x are roots of the polynomial below 4x^2-6x+1

goblinko [34]

Step-by-step explanation:

Just apply the quadratic formula $x=\frac{-b \left \ {{+} \atop {-}} \right. \sqrt{b^{2}-4ac} }{2a}$

Your equation is $4x^2-6x+1$
Every quadratic equation follows the general form $ax^2+bx+c$

In this case $a=4,b=-6,c=1$
Substitute into the quadratic formula:
$x=\frac{-(-6) \left \ {{+} \atop {-}} \right. \sqrt{(-6)^{2}-4(4)(1)} }{2(4)}\\x=\frac{6 \left \ {{+} \atop {-}} \right. \sqrt{36-16} }{8}\\x=\frac{6 \left \ {{+} \atop {-}} \right. \sqrt{20} }{8}$ Now take note that the square root of any number gives a (+) and (-) result, so two different answers
$x=\frac{6 + \sqrt{20} }{8} ,and\\x=\frac{6 - \sqrt{20} }{8}$ are the answers

7 0

3 years ago