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3 years ago

50 POINTS!!! I WILL GIVE BRAINLIEST TO WHOEVER SHOWS STEPS! THANK YOU!:)))

Mathematics

2 answers:

taurus [48]3 years ago

8 0

Answer:

Step-by-step explanation:

If you have something that says it is the f(x) or just f(something) then that is just telling you what the x equals. In this case, x=4 so you plug that into the equation.

This gives you f(4)=4(4)+7. From here, you will use the order of operations to solve.

f(4)=4*4+7

f(4)=16+7

f(4)=23

Temka [501]3 years ago

4 0

Answer:

f(4)=23

Step-by-step explanation:

1.f(4)=4(4)+7

2.f(4)=16+7

3.f(4)=23

hope this helps!

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River C is 400 miles longer than River D. If the sum of their lengths is 5,590 miles, what is the length of each river?

pychu [463]

Answer:

River C is: 2,965 miles long.

River D is: 2,565 miles long.

Step-by-step explanation:

$C=400+D\\C+D=5530$

Have a great day! ^^

7 0

3 years ago

Find the value of x in the isosceles triangle shown below.

natima [27]

Answer:

Sorry,for the answer it is too difficult brother .

8 0

2 years ago

PLEASE HELP WILL GIVE BRAINLIEST TO FIRST CORRECT ANSWER.

elixir [45]

Answer:

20 degrees

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

I am trying to understand how to solve for X, then solve the equation

Alina [70]

Answer:

x = 16

m<Y = 34°

Step-by-step explanation:

∆XYZ is an isosceles ∆. An isosceles ∆ has two equal sides, as well as the bases of the isosceles triangle are congruent. In this case, therefore:

<X = <Z

(6x - 23)° = (4x + 9)

Solve for x

6x - 23 = 4x + 9

Collect like terms

6x - 4x = 23 + 9

2x = 32

Divide both sides by 2

x = 16

m<Y = 180° - (m<X + m<Z) (sum of ∆)

m<Y = 180 - ((6x - 23) + (4x + 9))

Plug in the value of x

m<Y = 180 - ((6(16) - 23) + (4(16) + 9))

m<Y = 180 - (73 + 73)

m<Y = 34°

5 0

3 years ago

The problem -2x=9 equals the answer x=-4.5...is that correct or incorrect?

erastovalidia [21]

$-2x=9|:(-2)\\
x=-4.5
$

Yes.

5 0

3 years ago