2 years ago

Hi please help i’ll give brainliest please

Mathematics

1 answer:

andre [41]2 years ago

4 0

Answer:

28y+63

Step-by-step explanation:

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If f(x)=5x+a and f-1(10)=-1, find a

zhenek [66]

Answer:

Step-by-step explanation:

Given the function

$f(x)=5x+a$

and $f^{-1} (10)=-1(f^{-1} \text{is the inverse function of f})$

let f(x)=y

Substitute in f(x)

$y=5x+a\\y-a=5x\\x=\frac{y-a}{5}$

From the definition inverse function

if $f(x)=y$ ⇒ $f^{-1} (y)=x$

Substitute this in the above expression

$f^{-1} (y)=\frac{y-a}{5}$

Substitute y=10

⇒

$f^{-1} (10)=\frac{10-a}{5}\\-1=\frac{10-a}{5}\\-5=10-a\\a=10+5\\a=15$

Therefore a=15

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2 years ago

C. Sophia Thompson is 12 years old. Her

Vsevolod [243]

Answer:

28 I think

Step-by-step explanation:

12-5=7

7x4=28

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Julie was looking at the architect's blueprint of her house. The scale on the blueprint was inch = 1 foot. On the blueprint, wha

coldgirl [10]

12 inches by 16 inches

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2 years ago

Help please!!!!!!!!!!!!!

Natali [406]

I think it’s F I’m not sure if it’s correct !

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Zipora wants to construct a triangle that has the following angle measures: 50°, 75°, and 55°. How many triangles can she make?

Alborosie

As sum of all angles of triangle equal to 180 degrees.
First we have to add the angles.
50+75+55
=50+130
=180 degrees

Answer: Zipora can construct exactly one triangle.

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