Help please with 2 questions. I'll give brainiest!! Both questions PLEASE!

Mathematics

2 answers:

ozzi3 years ago

5 0

Answer:

23. $8

18. x=4p

Step-by-step explanation:

23.

$32 equals 1-1/5=4/5ths of her money (x)

32=(4/5)x

x=40

Now we know Anna has $40 dollars. If she spent 1/5th of it on the book,

40*(1/5)=8

Anna spent $8 on the book

18.

Multiply the number of boxes (p) by the number of muffins in each box (4) to get the total number of muffins (x)

x=4p

Nadusha1986 [10]3 years ago

4 0

Answer:

look at the picture i have sent

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Vladimir [108]

Answer:

a = 3/2
b = -1/2

Step-by-step explanation:

$\dfrac{\sqrt{5}-1}{\sqrt{5}+1}=\dfrac{(\sqrt{5}-1)(\sqrt{5}-1)}{(\sqrt{5}+1)(\sqrt{5}-1)}\\\\=\dfrac{5-2\sqrt{5}+1}{5-1}=\dfrac{6-2\sqrt{5}}{4}\\\\=\dfrac{3}{2}-\dfrac{1}{2}\sqrt{5}$

Comparing this to the form a+b√5, we see that ...

a = 3/2

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Find the volume of the following. Please round your answer to the nearest tenth. Please do not put units. Hint: You need to use

Sophie [7]

Answer:

Step-by-step explanation:

<u>The Volume of a Square Pyramid</u>

Given a square-based pyramid of base side a and height h, the volume can be calculated with the formula:

$\displaystyle V=\frac{1}{3}a^2h$

We are given a square pyramid with a base side a=14 ft but we're missing the height. It can be calculated by using the right triangle shown in the image attached below, whose hypotenuse is 25 ft and one leg is 7 ft

We use Pythagora's theorem:

$25^2=h^2+7^2$