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tester [92]
3 years ago
14

PLEASE HELP

Mathematics
1 answer:
Andreas93 [3]3 years ago
8 0

Answer:

Distance from bottom to side walk = 15.87 feet (Approx.)

Step-by-step explanation:

Given:

Height of ramp = 2 feet

Length of ramp = 16 feet

Find:

Distance from bottom to side walk

Computation:

Height of ramp (perpendicular) = 2 feet

Length of ramp (hypotenuse) = 16 feet

Distance from bottom to side walk (Base)

Base = √hypotenuse²- perpendicular²

Base = √16²- 2²

Base = √256 - 4

Base = √252

Base = 15.874

Distance from bottom to side walk = 15.87 feet (Approx.)

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What is 24 − 6 × 3 + 5x^{2} − (16 ÷ 2)?
Andrew [12]
<span>y=3x^2-30x-7  there u go</span>
5 0
3 years ago
A pole that is 3m tall casts a shadow that is 1.22m long. At the same time, a nearby building casts a shadow that is 38.5m long.
vichka [17]
Refer to the diagram shown below.

The height of the pole is CD (3 m), and its shadow is AB (1.22 m).
The height of the building is h m, and its shadow is AD (38.5 m).

The two triangles ΔABC and ΔADE are similar because of AAA.
Therefore
\frac{DE}{BC} = \frac{AD}{AB} \\\\  \frac{h}{3} = \frac{38.5}{1.22}

Cross multiply.
1.22 h = 3*38.5 = 115.5
h = 115.5/1.22 = 140.91 m

Answer: 141 m (nearest meter)

5 0
4 years ago
Read 2 more answers
7(2x-5)=21<br><br> What is x?
Over [174]

Answer:

x = 4

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

Step-by-step explanation:

<u>Step 1: Define Equation</u>

7(2x - 5) = 21

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Distribute 7:                   2x - 5 = 3
  2. Isolate <em>x</em> term:                2x = 8
  3. Isolate <em>x</em>:                         x = 4

<u>Step 3: Check</u>

<em>Plug in x into the original equation to verify it's a solution.</em>

  1. Substitute in <em>x</em>:                  7(2(4) - 5) = 21
  2. Multiply:                             7(8 - 5) = 21
  3. Subtract:                            7(3) = 21
  4. Multiply:                             21 = 21

Here we see that 21 does indeed equal 21.

∴ x = 4 is the solution to the equation.

6 0
3 years ago
I have to factor polynomials by grouping
LUCKY_DIMON [66]

Answer:

Step-by-step explanation:

Factor 6f3−8f2+20−15f

6f^3−8f^3−15f

=(3f−4)(2f2−5)

Answer:

(3f−4)(2f^2−5)

Find the group you want to factor, such as in the first parenthesis, you remove 3f from the whole equation, and end up with 3f-4. You take the end value, and group it with -5. You will then end up with 2f^2 -5.

Hope this Helps!

6 0
3 years ago
Quick i need your help
Stells [14]

Answer:

its the second one

Step-by-step explanation:

6 0
3 years ago
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