A cookbook cost 3 times as a storybook.A cookbook and 4 storybook cost $112.How much did a storybook cost?

Mathematics

2 answers:

Alexxx [7]3 years ago

6 0

Answer:

Cost of storybook is $16

Step-by-step explanation:

Let's assume that the Cost of storybook= ‘x’

If the cost of the cookbook is 3 times the cost of storybook then the cost of the cookbook will be ‘3x’

The cost of 1 cookbook and 4 storybooks = $112

The cost of cookbook and storybook can be calculated by the equation:

3x+4x=112

7x=112

Divide both sides by 7 to isolate x:

7x/7=112/7

x=16

Therefore, the cost of storybook is $16

Reptile [31]3 years ago

3 0

1c+4s=112
1c=3s
3s+4s=112
7s=112
Storybook= $16

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John has a rectangular-shaped field whose length is 62.5 yards and width is 45.3 yards. The area of the field is ________ square

oee [108]

Area = 2831.25 square yards

Perimeter =215.6 yards

EXPLANATION

The area and perimeter of a rectangular field are found using the formula for finding the area and perimeter of a rectangle respectively.

That means, area of the rectangular field is given by the formula,

$A= l\times w$

We just have to substitute
$l=62.5$ and $w= 45.3$ into the given formula and evaluate.

This implies that;

$A= 62.5\times 45.3$

This gives the area of the rectangular-shaped field to be;

$A= 2831.25$ square yards.

Now for the perimeter, we use the formula

$P=2w +2l$

Or

$P=2(w +l)$

Substituting the values for the length and width gives,

$P=2(62.5+45.3)$

$\Rightarrow P=2(107.8)$

$\Rightarrow P=215.6$

Hence the perimeter of the rectangular shaped field is 215.6 yards.

8 0

3 years ago

(3+5)x7-[10+(45-15)\5]

Gelneren [198K]

$Use\ PEMDAS\\\\(3+5)\times7-[10+\frac{(45-15)}{5}]=(8)\times7-(10+\frac{30}{5})\\\\=56-(10+6)=56-16=\boxed{\boxed{40}}$