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2 years ago

There are 40 questions on a test. Tina answered 85% of the questions correctly. How

Mathematics

1 answer:

Darina [25.2K]2 years ago

7 0

Answer:

Step-by-step explanation:

(40×85)/100

3400/100

is right answer

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Use the graph below to determine a1 and d for the sequence. graphed sequence showing point 1, negative 10, point 2, negative 7,

Sonja [21]

Answer:

$a_1=-10$

$d=3$

Step-by-step explanation:

we know that

In an <u><em>Arithmetic Sequence</em></u> the difference between one term and the next is a constant, and this constant is called the common difference (d)

In this problem we have the ordered pairs

$(1,-10),(2,-7),(3,-4),(4,-1),(5,2),(6,5)$

Let

$a_1=-10\\a_2=-7\\a_3=-4\\a_4=-1\\a_5=2\\a_6=5$

Find the difference between one term and the next

$a_2-a_1=-7-(-10)=3$

$a_3-a_2=-4-(-7)=3$

$a_4-a_3=-1-(-4)=3$

$a_5-a_4=2-(-1)=3$

$a_6-a_5=5-2=3$

The difference between one term and the next is a constant

This constant is the common difference

The sequence graphed is an Arithmetic Sequence

therefore

The first term is $a_1=-10$

The common difference is equal to $d=3$

4 0

3 years ago

If 4.5 pounds of chocolate cost $10, how

allsm [11]

I think 5.4

4.5÷10= 0.45

0.45x12=5.4

3 0

3 years ago

Maths question I'm struggling with.

Alex17521 [72]

Answer:

A = 2.63

B = 2

Step-by-step explanation:

To find the population density, what we need to do simply is divide the population by the area of the UK

mathematically, that would be;

(6.41 * 10^7)/243,610 = 263.125

To the nearest whole person= 263 people/ square meter

So now we want to write 263 in standard form = 2.63 * 10^2

So this means A = 2.63 and B = 2

6 0

3 years ago

What is the perimeter of parallelogram WXYZ

Kruka [31]

Graph? Or diagram? .................

8 0

2 years ago

Using appropriate properties find. 2/5×(-3/7)-1/6×3/2+1/14×2/5

BigorU [14]

Not for sure but maybe, -0.39285714285 if it’s correct hope it helps!

7 0

2 years ago