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2 years ago

In the following calculation, which part should be calculated first? 3 + (2 * 4) - 5 / 2

Mathematics

2 answers:

meriva2 years ago

8 0

Always solve the parenthese first

Nataliya [291]2 years ago

4 0

Basing from pemdas, begin with parentheses.
(2*4) should be calculated first

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2 years ago

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2 years ago

In a sample of 77 children , the mean age as at which they first began to combine words was 16.51 months

astraxan [27]

Answer:

Mean age = 1271.27

Step-by-step explanation:

No of children = 77

The age at which children first began to combine words = 16.51 months

Mean age = No of children × age at which children first began to combine words

= 77 × 16.51

= 1271.27

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7 0

2 years ago

1.- What type of parabola is this?

xz_007 [3.2K]

Answer:

Part 1

Sideways or "horizontal" parabola with a horizontal axis of symmetry.

Part 2

The vertex is the turning point: (-3, 1)

Part 3

Vertex form of a horizontal parabola:

$x=a(y-k)^2+h$

where:

(h, k) is the vertex
a is some constant
If a > 0 the parabola opens to the right.
If a < 0 the parabola opens to the left.

Point on the curve: (-1, 2)

Substituting the vertex and the found point into the formula and solving for a:

$\implies -1=a(2-1)^2-3$

$\implies -1=a-3$

$\implies a=2$

Part 4

Equation for the given parabola in vertex form:

$x=2(y-1)^2-3$

Equation in standard form:

$x=2y^2-4y-1$

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1 year ago

Candice recorded outdoor temperature of -5°C -1°c,and -2°C which following correctly compares the three temperature

lisov135 [29]

-5°C < -2°C < -1°C

Look at the picture.

6 0

2 years ago