3 years ago

The sum of 2x+7 and −x+12 is equal to 14 what is x?

Mathematics

1 answer:

Alekssandra [29.7K]3 years ago

4 0

Answer:-5

Step-by-step explanation:

2x+7-x+12=14

x+19=14

x=-5

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Expand the following 5( 2x -4 )

ycow [4]

Answer:

10x-20

Step-by-step explanation:

5(2x-4)

5x2=10

5x4=20

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3 years ago

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3 years ago

Please help me The difference of two numbers is 9. If the larger number is one more than twice the smaller number, find the lage

Helen [10]

Answer:

Step-by-step explanation:

Let the larger number be represented by x

Let the smaller number be represented by y

from the question, the next equations can be gotten :

x - y = 9 equation 1

x = 1 + 2y equation 2

Substitute for x in equation 1

1 + 2y - y = 9

1 + y = 9

Collect like terms

y = 9 - 1

y = 8

Substitute for y in equation 1 and solve for x (the larger number)

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3 years ago

At what rate per annum ci will RS 2000 amount to RS 2315.35 in 3 years

Mashutka [201]

<u>ANSWER: </u>

Rate per annum at which CI will amount from RS 2000 to RS 2315.35 in 3 years is 5%

<u>SOLUTION: </u>

Given,

P = RS 2000

C.I = RS 2315.35

T = 3 years

We need to find the rate per annum. i.e. R = ?

We know that,

When interest is compound Annually:

$Amount $=\mathrm{P}\left(1+\frac{\mathrm{R}}{100}\right)^{n}$$

Where p = principal amount

r = rate of interest

n = number of years

$2315.35=2000 \times\left(1+\frac{R}{100}\right)^{3}$

$\left(1+\frac{R}{100}\right)^{3}=\frac{2315.35}{2000}$

$\left(1+\frac{R}{100}\right)^{3}=1.157$

$1+\frac{R}{100}=\sqrt[3]{1.157}$

$1+\frac{R}{100}=1.0500$

$\frac{R}{100}=1.05-1$

$\frac{R}{100}=0.05$

R = 5%

Hence, rate per annum is 5 percent.

3 0

3 years ago

a pair of sunglasses is on sale for $26. The original price of the sunglasses was $40. What percent of the original price is the

Xelga [282]

65%...
26 divided by 40 = 0.65 x 100 = 65%
hope this helps!

5 0

3 years ago

Read 2 more answers