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ehidna [41]
3 years ago
14

Input value for the function machine that gives an output value of 3.

Mathematics
1 answer:
krek1111 [17]3 years ago
3 0

Answer:

x = –1

Step-by-step explanation:

From the question given above, the following data were obtained:

y = √(–2x + 7)

y = 3

x =?

The value of x can be obtained as follow:

y = √(–2x + 7)

3 = √(–2x + 7)

Take the square of both side

3² = –2x + 7

9 = –2x + 7

Collect like terms

9 – 7 = –2x

2 = –2x

Divide both side by –2

x = 2 / –2

x = –1

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shusha [124]

Multiply the first equation by -1

-3x-y=-4

2x+y=5

Add them up

-x=1

So x=-1

And y=7

So the first option is correct

8 0
3 years ago
What multiplies to -26 and adds to 5
Kryger [21]
The two numbers are (5+ √(129))/2 and (5-√(129))/2.

(5+ √(129))/2+ (5-√(129))/2= 5
(5+ √(129))/2* (5-√(129))/2= -26

Hope this helps~
6 0
3 years ago
Jo's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 to 2 and the ratio of Indian to
andreev551 [17]

Answer:(E). 25:2

Step-by-step explanation:

First ratio:

Us : India is 5 : 2

Second ratio

India : British is 5 : 1

multiply(5:2) by 5 and multiply (5:1) by 2 to balance the India stamps.

Therefore now

Us : India is 25 : 10

India : British is 10 : 2

The ratio of us : British is 25:2

5 0
3 years ago
Is a banana 14 cm or 30 cm
bagirrra123 [75]

I have never see a banana 30cm, so 14cm is the right answer.


3 0
3 years ago
Read 2 more answers
At Oliver's Hats, there are 18 baseball caps and 2 other hats. What percentage of the hats are baseball caps?
Kisachek [45]

Answer:

90%

Step-by-step explanation:

18+2=20

18/20=.9

.9*100=90

6 0
2 years ago
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