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dusya [7]
3 years ago
5

Can anyone explain me step two (in red)? Thanks in advance.

Mathematics
1 answer:
larisa86 [58]3 years ago
5 0

Answer:

umm

Step-by-step explanation:

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Solve for x<br> X ²-5x=2(leave answer in a surd form)
Lubov Fominskaja [6]
Hello,

x²-5x-2=0
Δ=5²+4*2=33
==>x= (5-√33)/2 or x=(5+√33)/2


7 0
4 years ago
Angle RST is a right angle. Angle RSU has a measure of 25°.
Angelina_Jolie [31]

Keywords

complementary angles, right angle

we know that

If two angles are <u>complementary angles</u>, then their sum is equal to a <u>right angle</u>

In this problem

Angle\ RSU+Angle\ TSU=90\° -------> by <u>complementary angles</u>

we have

Angle\ RSU=25\°

Substitute and solve for Angle TSU

Angle\ TSU=90\°-25\°=65\°

therefore

the answer is the option

65\°

5 0
3 years ago
Read 2 more answers
Alex wrote checks on Tuesday for $30 and $40. He also made a deposit in his
Ksivusya [100]

Alex finally had $(x+110) amount of money in his account i.e. He had $100 more then before!

<u>Step-by-step explanation:</u>

Alex wrote checks on Tuesday for $30 and $40. He also made a deposit in his checking account of $180. Let's solve it step by step :

<u>Alex wrote checks on Tuesday for $30 and $40:</u>

Let's suppose Alex initially had x amount of money out of which $30 & $40 is deducted! so left amount of money is $(x-70) .

<u>He also made a deposit in his checking account of $180:</u>

Out of left money $(x-70) , Alex deposited $180 in account so new money = $(x-70) + $180 = $(x+110)

Therefore, Alex finally had $(x+110) amount of money in his account i.e. He had $100 more then before!

6 0
3 years ago
A triangular pyramid and its net are shown. Rain uses the calculations below to conclude
Fynjy0 [20]

Answer:

is correct, he determines it correctly, he solved it correctly, 238.5

Step-by-step explanation:

7 0
3 years ago
An author is writing and illustrating a new book. The ratio of pages with text to pages with illustrations is represented in the
Nitella [24]

Answer:

Th number of pages is 33

Step-by-step explanation:

The ratio of the number of pages of text shown in the  illustration is 3:2. This implies that for every 2 pages of illustrations, there are 3 pages of text. Therefore, for 22 pages of illustration we shall have;

2 page of illustration = 3 page of text

Then

22 page of illustration  =  x pages of text

Then by Cross multiplication

22 \times 3 = x \times 2

66 = 2x

x =\frac{66}{2}

x = 33

4 0
3 years ago
Read 2 more answers
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