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snow_lady [41]
3 years ago
8

Determine whether x=1 and y=10 is a solution to the equations

Mathematics
1 answer:
Kay [80]3 years ago
4 0

Answer:

They are not solutions

Step-by-step explanation:

To see if it is correct we have to substitute the variables for the numbers given.

x+3=30

1+3≠30

2x-y=9

2·1-10≠9

So, these solutions would be incorrect.

You might be interested in
Do you think Apple will eventually meet their goal of becoming a replacement for a physical wallet? Why or why not?
Simora [160]

Answer:

No

Step-by-step explanation:

This would be more of an opinion and not a fact, but I see it as very unlikely that they will be able to accomplish this goal. Mainly due to human psychology. Most individuals want to be able to physically hold their money as well as being able to physically exchange their money for the goods that they need since physical cash is accepted worldwide. Another main reason is that individual's want to know that their money is theirs and that no bank or corporation can withhold their hard earned cash.

5 0
3 years ago
2 p
aivan3 [116]

Answer:

5:14

Step-by-step explanation:

The ratio of adults to children using the form 1:n would look like this:

number of adults : number of children

So:

5 adults : 14 children = 5:14

5 0
2 years ago
Read 2 more answers
Can somebody work out y/7=22
Alika [10]
Sure. So we can first identify our problem- there's a denominator. There's a simple fix, multiply both sides by the denominator to clear it. That leaves us with 7 = 22*7. y = 154.
7 0
3 years ago
Read 2 more answers
Which of the values satisfy the following inequality
Ira Lisetskai [31]

Answer:

  A:  x = 20

  C:  x = -9

Step-by-step explanation:

You can solve the inequality and compare that with the offered choices, or you can try the choices in the inequality to see if it is true. Either approach works, and they take about the same effort.

<u>Solving it</u>:

Unfold it ...

  -17 ≤ x -7.5 ≤ 17

Add 7.5 ...

  -9.5 ≤ x ≤ 24.5

The numbers 20 and -9 are in this range: answer choices A and C.

_____

<u>Trying the choices</u>:

A:  |20 -7.5| = 12.5 ≤ 17 . . . . this works

B:  |-10 -7.5| = 17.5 . . . doesn't work

C:  |-9 -7.5| = 16.5 ≤ 17 . . . . .this works

D:  |27-7.5| = 19.5 . . . doesn't work

The choices that work are answer choices A and C.

6 0
3 years ago
A random sample of 1000 registered voters in Flagstaff found 760 registered voters who support immigration reform. Find a 95% co
dusya [7]

Answer: (0.7335,\ 0.7865)

Step-by-step explanation:

Given : A random sample of 1000 registered voters in Flagstaff found 760 registered voters who support immigration reform.

sample size : n= 1000

sample proportion: \hat{p}=\dfrac{760}{1000}=0.76

Critical value for 95% confidence interval = z_{\alpha/2}=1.96

Confidence interval :

\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\\\\=0.76\pm(1.96)\sqrt{\dfrac{0.76(1-0.76)}{1000}}\\\\=0.76\pm0.0264708866493\\\\\approx0.76\pm0.0265\\\\=(0.76-0.0265,\ 0.76+0.0265)=(0.7335,\ 0.7865)

Hence, the  95% confidence interval for the true percent of registered voters in Flagstaff who support immigration reform: (0.7335,\ 0.7865)

6 0
3 years ago
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