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iVinArrow [24]
2 years ago
14

I really need help marking Brainliest if its right please explain your answer Make sure its correct:D..Please Help!

Mathematics
1 answer:
Lelechka [254]2 years ago
7 0

Answer:

answer is b

yes because 15-8=7 is true

Step-by-step explanation:

15-8=7

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What is f–1(8)??<br><br> Please select the best answer
notka56 [123]

Answer:

f^{-1}(8)=\frac{3}{2}

Step-by-step explanation:

Given f(x)=2x+5

We have to find f^{-1}(8)

In order to find f^{-1}(x) we have to make x as the subject of the formula

Let us assume f(x)=y

⇒2x+5=y

Subtracting both sides by 5

2x+5-5=y-5

2x=y-5

Dividing both sides by 2

\frac{2x}{2}=\frac{y-5}{2}

⇒x=\frac{y-5}{2}

Now substituting y with x

we have f^{-1}(x)=\frac{x-5}{2}

Now f^{-1}(8)=\frac{8-5}{2}

=\frac{3}{2}

So option (ii) is correct


5 0
2 years ago
Read 2 more answers
(05.02)A doghouse is to be built in the shape of a right trapezoid, as shown below. What is the area of the doghouse?
LenaWriter [7]

Answer:

32.5 square feet

Step-by-step explanation:

The formula for a trapezoid is a= 1/2*(b1+b2)*h. B1 and b2 would represent the two bases given and therefore doesn't matter what order you put them in. Plug in all values into the equation and you'll get 1/2*(5+8)*5 then 1/2*(13)*5. Next simplify to get 6.5*5 which then equates to 32.5.

5 0
3 years ago
Plz help me out!!!!!!!!!
ad-work [718]

between 3 and 4 would be 3.5cm

8 0
3 years ago
Read 2 more answers
Joe drove 538 miles in 9 hours 15 minutes what was his average speed per hour
DanielleElmas [232]
To calculate any speed, the equation is speed=distance/time
Basically, you first need to take your 9 hours and 15 minutes and combine them into a number with a decimal value.
So, 15*4=60
Sound familiar? Good, because 25*4=100, so they are the same here.
So, we can say 9 hours and 15 minutes is equal to 9.25
Take this now: Speed=538/9.25
You get 58.1621, which you can round to 58.2
This is, of course, your final answer, so Joe drove at 58.16 mph
7 0
3 years ago
3/24 =33/x. Use equivalent ratios to find the unknown value
Tasya [4]
X/the answer is 264
because 33 times 24 is 792 and divide that by 3 is 264
hope this helps :)
7 0
3 years ago
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