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Kryger [21]
3 years ago
6

Please someone help with this question asap

Mathematics
1 answer:
olga nikolaevna [1]3 years ago
6 0

Answer:

-19

Step-by-step explanation:

f(x) is the same as solving for the variable y

So y= -4(7)+9

f(7)= -28+9    = -19

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Is 8000 meters greater than 9 kilometers?
mrs_skeptik [129]

Answer:

no

Step-by-step explanation:

6 0
1 year ago
Read 2 more answers
The volume of a 10 ounce box of cheerios is 258.75in3. the length of the box is 4 inches less than the height and the width is 3
Marina86 [1]

Answer:

Height of the box = 11.5 in

Step-by-step explanation:

Let h be the height of the box.

Assuming the volume of the Box is 258.75\ in^3.

Given:

Length = Height - 4 = h - 4

Width = 3 in

We need to find the height of the box.

Solution:

We know that the volume of the box.

Volume = Length\times height\times width

Substitute all given value in above formula.

258.75 = (h-4)\times h\times 3

Rewrite the equation as:

258.75 = 3h(h-4)

258.75 = 3h^2-12h

3h^2-12h-258.75=0

whole equation divided by 3.

h^2-4h-86.25=0

Use quadratic formula with a = 1, b = -4,c=-86.25

h=\frac{-b\pm \sqrt{(b)^{2}-4ac}}{2a}

Put these a, b and c value in above equation.

h=\frac{-(-4)\pm \sqrt{(-4)^{2}-4(1)(-86.25)}}{2(1)}

h=\frac{4\pm \sqrt{16+345}}{2}

h=\frac{4\pm \sqrt{361}}{2}

h=\frac{4\pm 19}{2}

For positive sign

h=\frac{23}{2}  

h = 11.5 in

For negative sign

h=\frac{-15}{2}

h = -7.5

We take positive value of h.

Therefore, the height of the box h = 11.5 in

4 0
3 years ago
What’s the difference need help
labwork [276]
You would circle the 5
4 0
3 years ago
WILL MARK BRAINLIEST!!!!!!!!!!!!
aalyn [17]

Answer:

x+y=1+3

Step-by-step explanation:

6 0
3 years ago
ABC and CBD form a linear pair and have equal measures. Tell if ABC is acute, right, or obtuse
Murrr4er [49]
To form a linear pair means that when added, they equal 180 degrees.
but if they have equal measures....180/2 = 90...then they would both equal 90 degrees.....and 90 degrees is a right angle. 
So ABC and CBD are both right angles
6 0
3 years ago
Read 2 more answers
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