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noname [10]
4 years ago
13

Solve. 5x 5 = 4x 10 x =

Mathematics
1 answer:
Step2247 [10]4 years ago
5 0
5x + 5 = 4x + 10
5x - 4x = 10 - 5
x = 5
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Historically, Australia has 300 indigenous languages. Only 90 are still spoken today. What percent have gone extinct?
shtirl [24]

Answer:

70%

Step-by-step explanation:

well first you have to take put 90 over 300, times 100

<u>90</u> <u>100</u> = 30%

300 × 1

That gives you the percentage that is spoken today.

Then you have to take away that answer from 100%

100%

<u>-</u><u> </u><u> </u><u>30</u><u>%</u>

70 %

5 0
3 years ago
Find a4 for the arithmetic series with S4=-36 and a1=9
erastova [34]

ANSWER

The 4th term is -27

EXPLANATION

The sum of the first n-terms of an arithmetic sequence is

S_n= \frac{n}{2} (2a_1+d(n-1))

It was given that,

S_4 =  - 36

a_1 = 9

- 36= \frac{ 4}{2} (2 \times 9+d(4-1))

-36=2(18+3d)

-18=18+3d

-18 - 18 = 3d

3d =  - 36

d =  - 12

The n-term is given by:

a_n=a_1+ (n-1)d

We substitute n=4 to get,

a_4=9+ (4-1)  \times -12

a_4=9+ 3\times -12

a_4=9 - 36

a_4= - 27

5 0
3 years ago
24=2*3.14*r <br>What is the value of r?
grigory [225]
R=2.5 maybe
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7 0
4 years ago
Name the property of equation 8 x 1/8=1​
tatiyna

Answer:

Inverse property of multiplication

Step-by-step explanation:

7 0
4 years ago
make a scale drawing of a rectangle school hall which is 50m long and 30m wide using a scale of 1cm to 5m. use your scale drawin
Vladimir79 [104]
10cm by 6cm because 5 goes into 50 10 times so 10 time 1cm = 10cm and same for the other
7 0
3 years ago
Read 2 more answers
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