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Alexandra [31]
2 years ago
7

PLEASE HELP ILL GIVE BRAINLIST. PLEASE TRYPE WHAT TO SAY IN THE QUESTION!!! PLEASE AND THANK YOU!

Mathematics
2 answers:
inysia [295]2 years ago
8 0

Answer:

Using PEMDAS you would multiple first

Step-by-step explanation:

parenthesis ( )

exponent ^#

multiply *

divide /

addition +

subtract -

Alla [95]2 years ago
3 0

Answer:

Step-by-step explanation:

  1. You should Multiply first, because the question says “20 minus the product of” this means that you have to multiply 2 and 5 because whatever 2×5 equals is the product.
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Right triangles abc and dbc with right angle c are given below. If cos(a)=15,ab=12 and cd=2, find the length of bd.
dmitriy555 [2]

see the attached figure to better understand the problem

we have that

cos(A)=\frac{1}{5} \\ AB=12\ units\\ CD=2\ units

Step 1

<u>Find the value of AC</u>

we know that

in the right triangle ABC

cos (A)=(AC/AB)\\AC=AB*cos(A)

substitute the values in the formula

AC=12*(1/5)\\ AC=2.4\ units

Step 2

<u>Find the value of BC</u>

we know that

in the right triangle ABC

Applying the Pythagorean Theorem

AB^{2} =AC^{2}+BC^{2}\\ BC^{2}=AB^{2} -AC^{2}

substitute the values

BC^{2}=12^{2} -2.4^{2}\\BC^{2}= 138.24\\ BC=11.76\ units

Step 3  

<u>Find the value of BD</u>

we know that

in the right triangle BCD

Applying the Pythagorean Theorem

BD^{2} =DC^{2}+BC^{2}

substitute the values  

BD^{2} =2^{2}+11.76^{2}

BD=11.93\ units

therefore

<u>the answer is</u>

the length of BD is 11.93 units

8 0
3 years ago
Read 2 more answers
What is the retail price of a shirt that has a wholesale price of $12 and is marked up by 60 percent?
Soloha48 [4]

Answer: 19.20

Step-by-step explanation: What I did was figure out what 10% of 12 was (1.2) then multiplied it by 6 which was 7.2. Then I added that to 12 and got 19.2.

Let me know if this was helpful! :D

7 0
3 years ago
Read 2 more answers
Part 2 of me forgetting everything
Lunna [17]

Answer:

x = 15

Step-by-step explanation:

There are 2 triangles. The small triangle CDE has sides that are 8 and 20.

The big triangle CAB has sides 6+8 and 20 + x. Add the 6 and 8 which is 14. Create a proportion and cross multiply, divide, then solve for x.

\frac{8}{20}=\frac{14}{20+x\\}\\\\8(20 + x) = 20(14)\\160 + 8x = 280\\160-160+8x=280-160\\8x=  120\\8x/8=120/8\\x=15

8 0
2 years ago
A sample of 30 11th graders were asked to select a favorite pattern out of 6 choices. The following display shows what their fav
MrRissso [65]

Answer:

C

Step-by-step explanation:

It looks to me possibly C

hope it helps you

3 0
2 years ago
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Write an equation of the line that is perpendicular to 3x + 9y = 7 and passes through the point (6, 4)
andrezito [222]
The perpendicular line will have the x and y coefficients swapped and one of them negated. We can write the desired line as
  9(x -6) -3(y -4) = 0
where the coordinates of the point of interest are (6, 4).
Dividing by 3, this is
  3(x -6) -(y -4) = 0
  3x -y = 14

An equation for the line of interest is ...
  3x -y = 14

8 0
3 years ago
Read 2 more answers
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