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4 years ago

Only answer if yk it ! correct answer ill mark as brainliest!

Mathematics

1 answer:

Alex787 [66]4 years ago

4 0

Answer:

x=-5, x=-9

Step-by-step explanation:

x^2+45=-14x

add 14x to both sides

x^2+45+14x=-14x+14x

simplify

x^2+14x+45=0

solve using quadratic formula

a=1, b-14, c=45

x=-14±√14^2-4·1·45/2·1

(solve using a calculator or PEMDAS)

(solve for both + and -)

x=-5, x=-9

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Mt. McKinley, which is the highest elevation in North America, is 20,320 feet above sea level. Death Valley, which is the lowest

Llana [10]

Answer:

20,602 feet is the difference in height between the top of Mt. McKinley and the bottom of the Death Valley.

Step-by-step explanation:

Given:

Mt. McKinley, which is the highest elevation in North America, is 20,320 feet above sea level.

Death Valley, which is the lowest elevation in North America, is 282 feet below sea level.

Now, to find the difference in height between the top of Mt. McKinley and the bottom of the death valley.

Height of Mt. McKinley above sea level = 20,320 feet.

Height of Death Valley below sea level = 282 feet.

Now, to get the difference in height between the top of Mt. McKinley and the bottom of the Death Valley by adding both the heights:

$20320+282$

$=20602\ feet.$

Therefore, 20,602 feet is the difference in height between the top of Mt. McKinley and the bottom of the Death Valley.

5 0

3 years ago

How many grams must be adde to 970g to make 1 and a half kg

madam [21]

Answer:

530 grams

Step-by-step explanation:

970 grams = 0.970 kg

1 kg = 1000 grams

Thus: 500+30 = 530 grams

3 0

3 years ago

What is 20=8,it will be a real help.

Andrews [41]

Answer:

it is a invalid equation

Step-by-step explanation:

20 is not equal to 8

6 0

4 years ago

Read 2 more answers

The midpoint of AB is M(1, -4). If the coordinates of A are (-3,-6), what are the coordinates of B?

kramer

Answer:

The coordinates of B is (5,-2)

Step-by-step explanation:

In order to find the coordinates of B, you have to use midpoint formula. Then substitute the following values into the formula :

$m = ( \frac{x1 + x2}{2} , \frac{y1 + y2}{2} )$

Let (x1,y1) be A (-3,-6),

Let (x2,y2) be B,

Let midpoint be M (1,-4),

$(1, - 4) = (\frac{ - 3 + x2}{2} , \frac{ - 6 + y2}{2} )$

$by \: comparison, \:$

$\frac{ - 3 + x2}{2} = 1$

$- 3 + x2 = 2$

$x2 = 5$

$\frac{ - 6 + y2}{2} = - 4$

$- 6 + y2 = - 8$

$y2 = - 2$

6 0

3 years ago

Can someone please solve and give me a answer.

astraxan [27]

It will be will 86 first u add the 2 numbers together and then u get 94 then u do 180 minus 180 and u get 86

Mark as brainy

5 0

3 years ago