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3 years ago

Can someone please help me?

Mathematics

1 answer:

Aleks04 [339]3 years ago

5 0

Answer:

Step-by-step explanation:

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A 50 foot ladder is set against the side of a house so that it reaches up 30 feet. If

Allisa [31]

Answer:

21.8

Step-by-step explanation:

7 0

3 years ago

Serjik [45]

Answer:

d) 10

Step-by-step explanation:

x ÷ $\frac{1}{2}$ + 8 = 13

substitute 10 for x:

⇒ 10 ÷ $\frac{1}{2}$ + 8 = 13

solve:

1) divide 10 by $\frac{1}{2}$

⇒ 10 ÷ $\frac{1}{2}$ = 5

2) add 8 to 5

⇒ 8 + 5 = 13

8 0

3 years ago

Need help with math homework

Pavel [41]

Hello!

The answer for A is:

$X1=-1\\X2=5$

The answer for B is: The rocket will hit the lake surface in 5 seconds.

Defining the terms:

$a=-16\\b=64\\c=80\\$

So, replacing it in the quadratic equation (it's given to you in the exercise)\\

$x=\frac{-b+-\sqrt{b^{2}-4*a*c } }{2*a}$

$x=\frac{-64+-\sqrt{64^{2}-4*-16*80 } }{2*-16}$

$x=\frac{-64+-\sqrt{64^{2}+5120} }{-32}=\frac{-64+-\sqrt{4096+5120} }{-32}\\x=\frac{-64+-\sqrt{9216} }{-32}=\frac{-64+-\ 96 }{-32}\\x=\frac{-64+-\ 96 }{-32}\\x1=\frac{-64+\ 96 }{-32}=\frac{32}{-32} =-1\\\\x1=\frac{-64-\ 96 }{-32}=\frac{-160}{-32} =5\\$

We are working with a quadratic equation, so we will have two possible results,

$X1=-1\\X2=5\\$

Now, we are asked to find the time, time can not be a negative value, we have to discard X1 (-1) since it's a negative value, knowing that, the rocket will hit the lake after 5 seconds.

Have a nice day!

5 0

4 years ago

On a coordinate plane, point A is located at (7,4), and point B is located at (-8,4). What is the distance between the two point

Brums [2.3K]

The distance formula is d=\sqrt{(x_{2}, x_{1})^{2} +(y_{2}, y_{1})^2

7=x1

4=y2

-8=x2

4=y2

Just plug in the missing values into the equation and solve the equation :)

3 0

4 years ago

Dalton when to high school at 11 yrs and 3 months he left high school at 18 yrs and 2 months old how long did Dalton spend in hi

Tanya [424]

Answer:

Dalton spent 6 years and 11 months in high school.

Step-by-step explanation:

Dalton were in high school at the age = 11 years and 3 months He left high school at the age = 18 years and 2 months

Time spent by Dalton in high school = 18 years 2 months - 11 years and 3 months

= (18 - 11) years and (2 - 3) months

= 7 years - 1 month

= (6 + 1) years - 1 month

= 6 years + 1 year - 1 month

= 6years + 12 months - 1 month

= 6 years + 11 months

Therefore, Dalton spent 6 years and 11 months in high school.

6 0

3 years ago