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forsale [732]
2 years ago
6

How do i simplify -9-8+(-8×-9)-15 ?​

Mathematics
2 answers:
azamat2 years ago
8 0
-9-8+(-8x-9)-15=-9-8+72-15
=-32+72=40
Anestetic [448]2 years ago
6 0

Answer:

40

Step-by-step explanation:

PEMDAS

Do what is in the parentheses first.

-8 * -9 = 72

-9 - 8 + (72) - 15

-9 - 8 - 15 = -32

-32 + 72 = 40

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Im lost please help me
zepelin [54]
Let C = the Chinese books.
Let E = the English language books.

C = 4/5 E

E - 300 = C - 180 Notice how you get this equation. You take 300 away from the English books and 180 from the Chinese and according to the question, you get an equal number of both. Put c = 4/5E into the second equation.

E - 300 = 4/5 E - 180 Add 300 to both sides.
E = 4/5 E - 180 + 300
E = 4/5 E + 120 Now subtract 4/5 E from both sidies.
E - 4/5 E = 120
1/5 E = 120 Now multiply by 5
E = 120 * 5
E = 600

So the number of books are
600 written in English
4/5 of 600 = 2400 /5 = 480 Chinese books.

English 600
Chinese 480
6 0
3 years ago
Every day, 500 airplanes in San Francisco incur an additional 30 minutes of airport delays when flying into or out of the airpor
rusak2 [61]
A. San Francisco is the largest opportunity cost
4 0
3 years ago
Read 2 more answers
As shown in the diagram of the right triangles below, Triangle: ABC ~ Triangle: DEF, AB = 7x, BC = 4, DE = 7, EF = x. What is th
charle [14.2K]

since triangles are similar

4/x = 7x/7

=》 4/x = x

=》x^2 = 4

=》 x = 2

for right triangles a^2 = b^2+c^2

DF^2 = 7^2+2^2 = 53

=》 DF = 7.28

perimeter of DEF = 7 +2+7.28 = 16.28

8 0
3 years ago
If the simple interest on $6,000 for 4 years is $1,920, then what is the interest rate?
Vsevolod [243]

Answer:

8 percent

Step-by-step explanation:

Since the formula for interest rate is the original money, the amount of years, and the inetrest rate multiplied together, we could plug it into an equation. 6000 times 4 times the ineterest rate is equal to 1920. 6000 times 4 is 24000. 1920 divided by 24000 is equal to 0.08 or 8 percent.

6 0
3 years ago
Draw the grid of 3y- 4x=12
mylen [45]
This is the grid of 3y - 4x = 12

8 0
2 years ago
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