All categories

3 years ago

Solve for x in the equation.

Mathematics

1 answer:

oksano4ka [1.4K]3 years ago

5 0

$x^2 + 20x + 100 = 36$

$(x + 10)^2 = 36$

$x + 10 = \pm \sqrt{36}$

$x + 10 = 6$ or $x + 10 = -6$

$x = -4$ or $= -16$

You might be interested in

Ariana is going to invest in an account paying an interest rate of 1.9% compounded monthly. How much would Ariana need to invest

Brrunno [24]

Answer:

110000=p(1+0.019)^168

23.62p=110000

p=4660

8 0

3 years ago

A birthday celebration meal is $ 47.40 including tax, but not the tip. Find the total cost if a 15% tip is added to the cost of

Afina-wow [57]

Answer:

$54.51

Step-by-step explanation:

an easier way to do this is simply by multiplying 47.40x115%, which is 54.51.

another way to do this is by multiplying 47.40x15%, which is 7.11, then you'll have to added to 47.4, which gives you the same answer of 54.51

6 0

4 years ago

In the interval 0° ≤x≤360°, find the values of x for which sin x=-0.8176. Give your answer to the nearest degree.

Alenkasestr [34]

Answer:

$235, 305, 55$

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Find the midpoint of the segment with the following endpoints.

sergij07 [2.7K]

Answer:

( 5.5 , 4 )

Step-by-step explanation:

Use mid point formula shown in image

first x= (X+X)/2

x=(4+7)/2

x=11/2

x=5.5

y=(Y+Y)/2

y=(2+6)/2

y=8/2

y=4

(5.5,4)

4 0

3 years ago

Phyllis invested 50000 dollars, a portion earning a simple interest rate of 5 percent per year and the rest earning a rate of 7

Elodia [21]

Answer:

The amount invested at 5% was $39,000 and the amount invested at 7% was $11,000

Step-by-step explanation:

we know that

The simple interest formula is equal to

$I=P(rt)$

where

I is the Final Interest Value

P is the Principal amount of money to be invested

r is the rate of interest

t is Number of Time Periods

Let

x-----> the amount invested at 5%

50,000-x -----> the amount invested at 7%

$t=1\ year\\ I=\$2,720\\r_1=0.05\\r_2=0.07\\P_1=\$x\\P_2=\$(50,000-x)$

substitute in the formula above

$2,720=x(0.05*1)+(50,000-x)(0.07*1)$

solve for x

$2,720=0.05x+3,500-0.07x$

$0.07x-0.05x=3,500-2,720\\0.02x=780\\x=\$39,000$

$(50,000-x)=\$11,000$

therefore

The amount invested at 5% was $39,000 and the amount invested at 7% was $11,000

5 0

4 years ago