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qwelly [4]
3 years ago
12

Help please its hard for me

Mathematics
2 answers:
Mademuasel [1]3 years ago
7 0
The answer would be the first option: 7209.306
Levart [38]3 years ago
5 0

Answer:

7209.306

Step-by-step explanation:

  • 7 * 1000 = 7000
  • 2 * 100 = 200
  • 9 * 1 = 9
  • 3 * 1/10 = 3/10 OR .3
  • 6 * 1/1000 = 6/1000 OR .006

<em>All the products add up to 7209.306.</em>

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The height of a triangle is 3cm less than twice the base. The area is 10cm2
Kamila [148]

Answer:

The base is 4cm and the height is 5cm.

Step-by-step explanation:

This is a solve the system question. Call H the height of the triangle and B the base. The question tells us:

H=2B-3

and

\frac{B \times H}{2}=10

Sub the first equation into the second (as H is already isolated). You will end up with a quadratic equation - solve that any way you wish (e.g. quadratic formula). I've provided the factored form below which shows you the roots:

\frac{B(2B-3)}{2}=10\\\frac{2B^2-3B}{2}=10\\2B^2-3B=20\\2B^2-3B-20=0\\(2B+5)(B-4)=0\\B= - \frac{5}{2},4

In this question, we take B=4. You can't have a negative side length so the other answer is eliminated. Now sub the value for B into either of the original equations. I'll use the first, again because H is already isolated:

H=2(4)-3\\H=8-3\\H=5

3 0
3 years ago
Math homework help exponents
Len [333]

Answer + Step-by-step explanation:

\frac{5^{10}}{5^{5}} =5^{10-5} = 5^5

\text{used property :} \  \  \  \frac{a^{m}}{a^{n}} =a^{m-n}

_______________________

(4^8)^3 = a^{8 \times 3}=a^{24}

\text{used property :} \  \  \  (a^n)^m = a^{n \times m}

_______________________

10^{-4}=\frac{1}{10^{4}} \  \text{not} \  \frac{1}{4^{10}}

_______________________

15⁶ × 15³ = 15⁶⁺³ = 15⁹

_______________________

<u>Recall</u> : If a ≠0  ⇒ a⁰ = 1

Then

Since 6⁸ ≠ 0  ⇒ (6⁸)⁰ = 1  

6 0
1 year ago
Decrease an integer by 20 w/the correct algebraic expression <br> 2x-20<br> 20-2x<br> X-20<br> 20-x
lubasha [3.4K]

Answer:31200

Step-by-step explanation:

8 0
3 years ago
(x^2 - 4)(x^2 + x - 12) = 0
tatiyna

Answer:

is that a T or F

Step-by-step explanation:

3 0
3 years ago
a ramp measures 6 feet long. if the ramp is 12 inches tall, what is the horizontal distance that it covers?
svp [43]
We know that

1 ft--------> is equals to 12 in
the ramp is 12 inches tall----------> 1 ft tall
<span>A ramp measures------------------>  6 ft long
</span>
<span>applying the Pythagorean theorem
</span>c²=a²+b²
where
c-----> 6 ft long
a----> horizontal distance
b-----> 1 ft tall

a²=c²-b²------> a²=6²-1²-----> a²=35------> a=√35------> a=5.92 ft

the answer is
5.92 ft

8 0
3 years ago
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