All categories

3 years ago

Simplify this expression. 20.25 –9 1/2+ 11 Pls help

Mathematics

1 answer:

grigory [225]3 years ago

7 0

Answer:

The answer is -0.25.

Step-by-step explanation:

Using PEMDAS, add 9.5 + 11 first, which results in 20.5. Then substract 20.5 from 20.25, 20.25 - 20.5. This leads to -0.25 or -1/4.

You might be interested in

If you place a 24-foot ladder against the top of a 22-foot building, how many feet will the bottom of the ladder be from the bot

Naddika [18.5K]

Answer:

9.6

Step-by-step explanation:

Use the Pythagorean Theorem

a² + b² = c²

Plug in the knowns

a² + 22² = 24²

Subtract 22² from both sides

a² = 24² - 22²

a² = 576 - 484

a² = 92

Take the square root of both sides

a = 9.591663046625438

Rounded

a = 9.6 ft

8 0

3 years ago

Read 2 more answers

Ajay is researching how the population of his hometown has changed over time. Specifically, he learns his hometown had a populat

777dan777 [17]

Answer:

Could you Write the question more clearly?

Step-by-step explanation:

7 0

3 years ago

Fiona has met her goal of exercising 150 minutes a week. She has kept it up for six months and is sure that it is now solidly pa

cricket20 [7]

Answer:

Step-by-step explanation:

You are always able to do better, and Fiona needs to reflect

4 0

2 years ago

High grade steel consists of 85% iron and 15% magnese. Low grade steel consists of 67% iron and 33% mag ese. NASA orders 500 ton

Mamont248 [21]

Answer:

$361\dfrac{1}{9}$ tons of high steel and $138\dfrac{8}{9}$ tons of low steel

Step-by-step explanation:

Let x be the number of tons of high grade steel and y be the number of tons ow low grade steel needed.

In x tons of high grade steel there are

$0.85x$ tons of iron

$0.15x$ tons of magnese

In y tons of low grade steel there are

$0.67y$ tons of iron

$0.33y$ tons of magnese

NASA orders 500 tons of steel, so

$x+y=500$

and specifies that it must be in the proportion 80% iron and 20% magnese, so

$0.85x+0.67y=500\cdot 0.8\\ \\0.85x+0.67y=400$

From the first equation,

$x=500-y$

Substitute it into the second equation:

$0.85(500-y)+0.67y=400\\ \\425-0.85y+0.67y=400\\ \\-0.18y=-25\\ \\y=\dfrac{2,500}{18}=138\dfrac{8}{9}\ tons\\ \\x=361\dfrac{1}{9}\ tons$

7 0

4 years ago

That propertand of an arraand is still in the equation k (A + B) = kA + kB

Anarel [89]

Answer:

that propertand of an arraand is in the equation

select the appropriate response

c Transposition

6 0

3 years ago