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AnnyKZ [126]
3 years ago
12

Evaluate the expression: 2x + 5 for x = 3

Mathematics
1 answer:
lubasha [3.4K]3 years ago
5 0

Substitute the value of the variable into the equation and simplify.
11
11
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A statue is mounted on top of a 16 foot hill. From the base of the hill to where you are standing is 77 feet and the statue subt
DanielleElmas [232]

Consider right triangle with vertices B - base of the hill, S - top of the statue and Y - you. In this triangle angle B is right and angle Y is 13.2°. If h is a height of the statue, then the legs YB and BS have lengths 77 ft and 16+h ft.

You have lengths of two legs and measure of one acute angle, then you can use tangent to find h:

\tan 13.2^{\circ}=\dfrac{\text{opposite leg}}{\text{adjacent leg}} =\dfrac{16+h}{77}, \\ \\ 0.2345=\dfrac{16+h}{77},\\  \\ 16+h=0.2345\cdot 77=18.0565,\\ h=18.0565-16=2.0565 ft.

Answer: the height of the statue is 2.0565 ft.

8 0
3 years ago
Read 2 more answers
HELP A KID IN NEED
Stella [2.4K]

Answer:

8z+5

Step-by-step explanation:

Let's split the expression into two terms- z and... not z :)

3z+5z=8z

Why? it's just 3+5 with z tacked on the end

14-9=5

simple math :)

put it together to get

8z+5

all done!

lmk if you have any more questions

8 0
3 years ago
Write the equation of a line, in slope-intercept form, that has a slope of m=9 and passes through the point (4, 31)
Darina [25.2K]

Answer:

9x-y = 5

Step-by-step explanation:

Equation of line in slope intercept form:

y-y1 = m*(x-x1), m=9, (x1,y1)=(4,31)

y-31 = 9*(x-4)

y-31 = 9x-36

9x-y = 36-31

9x-y = 5

4 0
3 years ago
Please help <br><br>simplify the expression (4x10^8) (8.2 x 10^-2​
ValentinkaMS [17]

Answer:

32800000x

Step-by-step explanation:

5 0
3 years ago
Emily is preparing cookies for her friends she is at the market where she sees a 14 ounce bag of chocolate chips for 3.50 the ma
g100num [7]

Answer:

Bag 2

Step-by-step explanation:

Given

Bag 1:

14\ ounce = 3.50

Bag 2:

24\ ounce = 5.28

Required

Which is a better buy

To get which buy is better, we first get the unit price of each bag.

Unit\ Price = Amount/Size

For bag 1:

Unit\ Price = 3.50/14

Unit\ Price = 0.25

For bag 2:

Unit\ Price = 5.28/24

Unit\ Price = 0.22

The best buy is the one with smaller unit price

Hence, bag 2 is better to buy

4 0
3 years ago
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