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3 years ago

A shelf is built on a wall, as shown below. What is the value of x? (2x+1) + (3x-1)

Mathematics

1 answer:

Hoochie [10]3 years ago

6 0

Answer:

x = 18

Step-by-step explanation:

We need to find the value of x.

We know that the sum of angles of a triangle is equal to 180°. So, using this property,

2x+1+3x-1+90 = 180

2x+3x = 180-90

5x = 90

x = 18

So, the value of x is equal to 18.

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10 – 7x = 2 – 8x What is x

SVETLANKA909090 [29]

Answer:

x = 12

Step-by-step explanation:

10 – 7x = 2 – 8x

– 7x + 8x = 2 + 10

x = 12

7 0

4 years ago

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Jeremy bought a new truck for $32,000. The value of the truck after t years can be represented by the formula V = 32,000(.8)^t.

blondinia [14]

$6700=32000(0.8)^t$
divide both sides by 32000
$\frac{67}{320}=0.8^t$
take the ln of both sides
$ln( \frac{67}{320})=ln(0.8^t)$
using the property that $ln(a^b)=b(ln(a))$
$ln( \frac{67}{320})=t(ln(0.8))$
divide both sides by ln(0.8)
$\frac{ln( \frac{67}{320}) }{ln(0.8)} =t$
use calculator
7.00728=t
so in about 7 years

B

3 0

4 years ago

Read 2 more answers

Is the number 56 prime or composite

Wewaii [24]

Answer:

Composite

Step-by-step explanation:

The number 56 is a composite number.

7 0

4 years ago

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On a standardized science test, the seniors at Fillmore High School have a mean score of 430 with a standard deviation of 90.

olasank [31]

Answer:

For random samples of 100 seniors, 68% of the sample means fall between 340 and 520

Step-by-step explanation:

As a property of normal distribution, 68% of sample means fall between mean - sigma(430 - 90 = 340) and mean + sigma (430 + 90 = 520) (here, sigma is standard deviation).

Hope this helps!

3 0

3 years ago

If 5n - 3 = 7n – 5, then n= A -4 BO o D 6

ch4aika [34]

Answer:

The value of n is 1

Step-by-step explanation:

Given the expression $5n-3= 7n-5$