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trapecia [35]
2 years ago
7

5-7k=-4(k+1)-3 add work pleasee!!!

Mathematics
2 answers:
soldi70 [24.7K]2 years ago
5 0
K=4
Tip next time you do this try using a calculator more reliable.
marshall27 [118]2 years ago
3 0

Answer:

k=4

Step-by-step explanation:

5-7k=-4(k+1)-3

Distribute

5-7k=-4k-4-3

Combine like terms

5-7k=-4k-7

Add 7k to each side

5-7k +7k = -4k+7k-7

5 = 3k-7

Add 7 to each side

5+7 = 3k-7+7

12 = 3k

Divide by 3

12/3 = 3k/3

4=k

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Barb exercise for 14 hours in 1 week how many hour does she exercise in 32 weeks
Blizzard [7]
14 times 1 = 14

14 times 32 = 448

Barb exercised for 448 hours in 32 weeks.
8 0
3 years ago
The shorter leg of a right triangle is 6m shorter than the longer leg. the hypotenuse is 6m longer than the longer leg. find the
Gennadij [26K]
Short leg = x-6m
Longer leg =x
Hypotenuse = x+6m

x² + (x-6)² =(x+6)²
x² + x²-12x+36 = x²+12x+36
2x²-12x+36= x² +12x+36
2x²-12x+36-36= x² +12x+36-36
2x² - 12x-12x = x²+12x-12x
2x² -24x-x² = x²-x²
x² -24x = 0
x(x-24)=0
x = 24

Short leg = 24-6m = 18
Longer leg =24
Hypotenuse = 24+6m=30

Check
a² + b² = c²
18² +24² =30²
324 +576 = 900
900=900
7 0
3 years ago
How many times as fast as a propeller plane at 266 mph is a jet at 625 mph?
ivann1987 [24]
2.3496240602


625÷266
5 0
3 years ago
Find the equation of this line
adelina 88 [10]

Answer: y = - 3/1x + 4

Step-by-step explanation:

- 3/1x = -3x

y = - 3/1 + 4 = -3x + 4

6 0
2 years ago
Read 2 more answers
Which is the equation of a parabola with vertex (0, 0), that opens to the left and has a focal width of 12?
sattari [20]

Answer:

\text{Equation of parabola is }y^2=-12x

Step-by-step explanation:

We need to find the equation of parabola using given information

  • Vertex: (0,0)
  • Open to the left
  • Focal width = 12

If parabola open left and passes through origin then equation is

y^2=-4ax

Focal width = 12

Focal width passes through focus and focus is mid point of focal width.

Focus of above parabola would be (-a,0)

Passing point on parabola (-a,6) and (-a,-6)

Now we put passing point into equation and solve for a

6^2=-4a(-a)

a=\pm 3

a can't be negative.

Therefore, a=3

Focus: (-3,0)

Equation of parabola:

y^2=-12x

Please see the attachment of parabola.

\text{Thus, Equation of parabola is }y^2=-12x

6 0
3 years ago
Read 2 more answers
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