All categories

3 years ago

What’s the triangle congruence shortcut

Mathematics

2 answers:

mina [271]3 years ago

7 0

Answer:

D. All those resources can be found in Africa

Yuki888 [10]3 years ago

6 0

AnswerSSS, SAS, ASA, AAS

Step-by-step explanation: Knowing that only side-side-angle does not work bc the unknown side could be located in two different places bc there are 6 corresponding parts 3 angles and 3 sides, you don't need to know all of them.

You might be interested in

What does it mean when ph is slightly acidic?

Nutka1998 [239]

D. Slightly acidic is 5.0 to 5.5

8 0

3 years ago

<img src="https://tex.z-dn.net/?f=Factor%3A%20x%5E2-9" id="TexFormula1" title="Factor: x^2-9" alt="Factor: x^2-9" align="absmidd

Bezzdna [24]

Answer:

x²-9=x²-3²=(x+3)(x-3)

Step-by-step explanation:

use formula

a²-b²=(a+b)(a-b)

7 0

2 years ago

How many pounds of a 15% copper alloy must be mixed with 700lb of a 30% copper alloy to maybe a 25.5% copper alloy

lisov135 [29]

Answer:

$300\; \rm lb$ .

Step-by-step explanation:

Let $x$ represent the mass (in pounds) of that $15\%$ copper alloy required, such that the final mixture would contain $25.5\%$ copper by mass.

Consider: if $x$ pounds of that $15\%$ copper alloy is mixed with $700$ pounds that $30\%$ copper alloy, what would be the mass of copper in the mixture?

Mass of copper in $x$ pounds of that $15\%$ copper alloy: $(0.15\, x)\; \rm lb$ .
Mass of copper in $700$ pounds of that $30\%$ copper alloy: $700 \times 0.30 = 210\; \rm lb$ .

Therefore, the mixture would contain $(210 + 0.15\, x) \; \rm lb$ of copper.

The mass of that mixture would be $(700 + x)\; \rm lb$ . The mass fraction of copper in that mixture would be:

$\displaystyle \frac{(210 + 0.15\, x)\; \rm lb}{(700 + x)\; \rm lb} \times 100\%$ .

This ratio is supposed to be equal to $25.5\%$ . These two pieces of equations combine to give an equation about $x$ :

$\displaystyle \frac{(210 + 0.15\, x)\; \rm lb}{(700 + x)\; \rm lb} \times 100\% = 25.5\%$ .

$\displaystyle \frac{210 + 0.15\, x}{700 + x} = 0.255$ .

Simplify and solve for $x$ :

$210 + 0.15\, x= 0.255\, (700 + x)$ .

$(0.255 - 0.15)\, x= 210 - 0.255 \times 700$ .

$\displaystyle x = \frac{210 - 0.255 \times 700}{0.255 - 0.15} = 300$ .

Therefore, $300\; \rm lb$ of that $15\%$ alloy would be required.

4 0

2 years ago

What is the square root of 5

Ratling [72]

Answer:

The square root of 5 is 2.23, or just 2.

I hope I helped!

Step-by-step explanation:

6 0

3 years ago

A projectile is launched at an angle of 45 degrees with an initial speed of 32 feet per second. How far does the projectile trav

Hatshy [7]

Answer:

As the first part comes to the rest means, then it will fall under gravity directly.

First of all maximum height,

u²sin²θ

2×10

400×(

)

H=10m.

As initially the full projectile was supposed to land at A but due to explosion first part land at A', so to make the centre of mass lies at A the second part should lie at B.

f they don't break (explode) range OA

OA=

u²sin2θ

OA=400×sin45×

6 0

2 years ago