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Zinaida [17]
3 years ago
7

What’s the correct answer

Mathematics
1 answer:
Mars2501 [29]3 years ago
6 0
X is greater than or equal to 5 and less than or equal to 10.
Now x is given, which is 9 and y = 20(9)
y = 180.

Is y > 80?
If yes then z = y+ 20.
If no then z = y - 10.

The solution we got for y is 180 and is greater than 80, so above statement is true.
z = y + 20
z = 180 + 20
z = 200

Answer: 200
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Which of the equations below could be the equation of this parabola?
BARSIC [14]

Parabolas like y=ax^2 have the y-axis as their symmetry axis, so options B and D are surely wrong.

Moreover, parabolas like x=ay^2 have the x-axis as their symmetry axis. If a>0 the parabola is concave rightwards, if a the parabola is concave leftwards.

Since your parabola is concave leftwards, the only feasible option is x=-2y^2

7 0
3 years ago
A rectangle has an area of 112cm. The length and width of the rectangle are changed by a scale factor of 1.5. What is the area o
soldi70 [24.7K]

Answer:

252 cm²

Step-by-step explanation:

Area of a rectangle is width times length:

A = WL

If the width and length increase by a factor of 1.5:

A = (1.5 W) (1.5 L)

A = 2.25 WL

So the area increases by a factor of 2.25.

2.25 × 112 cm² = 252 cm²

4 0
3 years ago
Thanks for helping...
slava [35]

Answer:

16

Step-by-step explanation:

Subtracting the given expressions, that is

3b² - 8 - (b(b² + b - 7) ) ← simplify parenthesis

= 3b² - 8 - (b³ + b² - 7b) ← distribute parenthesis by - 1

= 3b² - 8 - b³ - b² + 7b ← collect like terms

= - b³ + 2b² + 7b - 8 ← substitute b = - 3

= - (- 3)³ + 2(- 3)² + 7(- 3) - 8

= - (- 27) + 2(9) - 21 - 8

= 27 + 18 - 21 - 8

= 16

7 0
3 years ago
An experiment has conducted a single-factor completely randomized design with three levels of factors and five replicates. The c
Ad libitum [116K]

Answer / Step-by-step explanation:

To properly understand the principle behind the solving of this question, it would be necessary to define and go through some basic terms and their definition.

Therefore to start with, a completely randomized single factor is a type of experiment in which One factor of two or more levels has been manipulated. e.g, the experiment may be investigating the effect of different levels of cost, expenditure or different advertisements

Also, it should be noted that in the area of groping of the experiment, At this point, Each group of different level receives one of the a levels of the independent variable with participants being treated identically in every other respect. The two-group experiment considered previously is a special case of this type of design.

Consequentially, the answer to the narrative of the question would then be:

N= 3 factors levels x 5 replicates = 15

Degrees of freedom for the factor:  a – 1 = 3 – 1 = 2

Degrees of freedom Total = 15 – 1= 14

Degrees of freedom error = Total – factor = 14 – 2 = 12

Bounds of P-value for F = 2.91 with 2 and 12 degrees of freedom are

= 0.01 < P < 0.05

3 0
4 years ago
Al’s pet store had 14 small lizards and some large lizards. After selling 2 lizards, there were 30 in the store. How many large
Vlad1618 [11]

Answer:

Total no of lizard=lizard sold+ lizard remaining

30 +2

Total -small

Large lizards =32-14

=18

Step-by-step explanation:

7 0
3 years ago
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