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mars1129 [50]
3 years ago
12

Q28. In a sale, the normal price of a book is reduced by 30%. The sale price of the book is £2.80 Work out the normal price of t

he book.​
Mathematics
1 answer:
lisov135 [29]3 years ago
8 0

Answer:

0.90

Step-by-step explanation:

090. = 0.90

30/2.80

28

00

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I = Prt
Olegator [25]

Answer:

r=3.5\%

Step-by-step explanation:

we know that

The simple interest formula is equal to

I=P(rt)

where

I is the Final Interest Value

P is the Principal amount of money to be invested

r is the rate of interest  

t is Number of Time Periods

in this problem we have

t=5\ years\\ P=\$1,200\\ I=\$210\\r=?

substitute in the formula above

210=1,200(5r)

solve for r

r=210/6,000

r=0.035

convert to percentage (multiply by 100)

r=3.5\%

6 0
3 years ago
Pls help me plssss. Bella measured the heights of her corn stalks in centimeters. The heights are 81, 88, 69,65, 87.
astra-53 [7]

Hullo!

Your answer is C! Or 78 cm!!

Hopefully this helps! :D

7 0
3 years ago
Read 2 more answers
I need help !!!!!!!!!!!!!!!
koban [17]
Angle B= 45 degrees
Angle A = 45 degrees

A and B are congruent since they are alternate exterior angles
5x-15 = 2x +21
5x = 2x +36
3x=36
X=12
B)
2x12+21 = 45
A)
5x12-15 =45
3 0
3 years ago
Read 2 more answers
Add 5 1/2 kg to 450g​
Norma-Jean [14]

1kg = 1000g

51/2 kg= 51/2×1000=51×500=25500g

25500g+450g= 25950g

5 0
3 years ago
Read 2 more answers
How many times does the quadratic function below intersect the x-axis? y=x+10x+25
krok68 [10]

Answer:

It touches the x-axis once, but does not intersect it

Step-by-step explanation:

I'm assuming it's supposed to be y = x² + 10x + 25.  This equation does not intersect the x-axis, but it does touch the x-axis.  

Solve the equation for x...

0 = x² + 10x + 25

factor...

0 = (x + 5)(x + 5)

The solution repeats, this means that the function touches the x-axis and then bounces off, but doesn't intersect it.  Intersect meant to cross the line, here it just touches it.

See the attached photo to see the graph...

5 0
3 years ago
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