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3 years ago

Given the function f(x)=2x-7. What is x when f(x)=17?

Mathematics

2 answers:

VashaNatasha [74]3 years ago

7 0

Answer:

f(17)=2(17)-7

=34-7

=27

Eduardwww [97]3 years ago

4 0

Answer:

x = 12

Step-by-step explanation:

Step 1: Define

f(x) = 2x - 7

f(x) = 17

Step 2: Substitute

17 = 2x - 7

Step 3: Solve for x

Add 7 on both sides: 24 = 2x

Divide both sides by 2: 12 = x

Step 4: Check

f(12) = 2(12) - 7

f(12) = 24 - 7

f(12) = 17

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C. 13 yd 2 ft 6 in × 15

GrogVix [38]

Answer:

7,470

Step-by-step explanation:

Step 1: Convert all into inches

1 feet = 12 inches

2 feet = x inches

Cross multiply

x = 24 inches

1 yard = 36 inches

13 yard = x inches

Cross multiply

x = 468 inches

Step 2: Add all inches together

24 + 468 + 6 = 498 inches

Step 3: Multiply by 15

498 x 15 = 7,470

Therefore, the answer is 7,470.

8 0

3 years ago

Read 2 more answers

Please Help..............

Anvisha [2.4K]

Well to do scientific notation u have to use 10 then an exponent
example:
2.9867 x 10^10= 29,867,000,000
so u need exponents to do scientific notation.

7 0

3 years ago

The maximum value of the function: f(x)= -5 x ^2 +30x-200 is?

VARVARA [1.3K]

Answer:

$\displaystyle - 155$

Step-by-step explanation:

we are given a quadratic function

$\displaystyle f(x) = - 5 {x}^{2} + 30x - 200$

we want to figure out the minimum value of the function

to do so we need to figure out the minimum value of x in the case we can consider the following formula:

$\displaystyle x _{ \rm min} = \frac{ - b}{2a}$

the given function is in the standard form i.e

$\displaystyle f(x) = a {x}^{2} + bx + c$

so we acquire:

b=30
a=-5

thus substitute:

$\displaystyle x _{ \rm min} = \frac{ - 30}{2. - 5}$

simplify multiplication:

$\displaystyle x _{ \rm min} = \frac{ - 30}{ - 10}$

simply division:

$\displaystyle x _{ \rm min} = 3$

plug in the value of minimum x to the given function:

$\displaystyle f (3)= - 5 {(3)}^{2} + 30.3 - 200$

simplify square:

$\displaystyle f (3)= - 5 {(9)}^{} + 30.3 - 200$

simplify multiplication:

$\displaystyle f (3)= - 45 + 90- 200$

simplify:

$\displaystyle f (3)= - 155$

hence,

the minimum value of the function is -155

5 0

2 years ago

What is the problem to this

irakobra [83]

4:9
24:x
Set up a proportion
4/9=24/x
4x=216
x=54
a) 54 is your answer
hope this helps, and please give brainliest if it does!

6 0

3 years ago

Read 2 more answers

Find the area of the figure?

Alex777 [14]

Answer:

14 m

Step-by-step explanation:

For the triangle, you use the formula A=1/2bh. So in this case it's 3×4×1/2. 3×4 is 12, times 1/2 is 6 m. Now for the rectangle it's just 2×4 which is 8. 8+6 is 14. Hope this helps! If you are still confused please comment!

6 0

3 years ago