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natita [175]
3 years ago
9

Tractice writing as a qua

Mathematics
1 answer:
Firlakuza [10]3 years ago
3 0

Answer:

  • z = 3x+2
  • z^2 +7z -8 = 0

Step-by-step explanation:

Define ...

  z = 3x+2

Substitute for that expression in the given quadratic:

  z^2 +7z -8 = 0 . . . . . . your equivalent quadratic

_____

This equation is easily solved by factoring:

  (z +8)(z -1) = 0

  z = -8 or +1

Then x can be found from z:

  (z -2)/3 = x

  (-8 -2)/3 = x = -10/3

  (+1 -2)/3 = x = -1/3

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Solve for x. (have to add extra letters so the question works)
zloy xaker [14]

Answer:

x=11°

Step-by-step explanation:

-Sum of angles of a triangle should alway be 180 degrees

35+110+2+3x=180

-Add all known values

147+3x=180

-Subtract 147 from both sides

3x=33

-Isolate x by divind both sides by 3

x=11°

5 0
3 years ago
When pointing A(-6. - 12) is reflected over the y-axis to get point B, what are the
Fudgin [204]

Answer:

A

Step-by-step explanation:

under a reflection in the y- axis

a point (x, y ) → (- x, y ) , then

A (- 6, - 12 ) → B (6, - 12 )

4 0
2 years ago
Quadrilateral ABCD is a rhombus. Suppose measure of angle A decreases. Which of the following changes would also need to happen
marshall27 [118]
The angle across from A would have to decrease as it should be the same as angle A
4 0
3 years ago
Using faucet P, you can fill a sink in 10 minutes. Faucet Q takes only 8 minutes to fill the same sink. How long will it take to
nevsk [136]

It would take 4.44 minutes to fill the sink using both faucets P and faucet Q together

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

Let t represent the time it takes to fill the sink using both faucets together, hence:

(1/10 + 1/8)t = 1

t = 4.44 minutes

It would take 4.44 minutes to fill the sink using both faucets P and faucet Q together

Find out more on equation at: brainly.com/question/2972832

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4 0
1 year ago
15. During the summer, Briana runs an ice cream shop. Her biggest seller is waffle ice cream cones. She charges $1.85 for a waff
Ivahew [28]

15) It is given that the charge of the waffle cone = $1.85

Charge per scoop of an ice cream = $0.60

Let C be the total cost.

So, total charge of one wafflce cone ice cream = charge of the waffle cone + (0.6 times number of scoops

C = 1.85 + 0.6x

16) To find the cost for 6 scoops of ice cream, put x = 6 in the above expression and simplify.

C = 1.85 + 0.6(6)

   = 1.85 + 3.6

   = 5.45

Hence, cost of 6 scoops of ice cream = $5.45.                                                                                

7 0
3 years ago
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