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Masja [62]
2 years ago
5

Can someone please answer this question I really need it?

Mathematics
2 answers:
Vlad [161]2 years ago
7 0

Answer: the answer is A

Step-by-step explanation: i know this because i am a genius and you should listen to me

QveST [7]2 years ago
7 0

Answer:

The answer is A

Step-by-step explanation:

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Use the three steps to solve the problem.
Mazyrski [523]
Let's assume a the age of Joe
b the age of James
a=b+10 (1)
2*(a+8)=3(b+8) (2)

==> 2*(b+10+8)=3b+24
==>2b+36=3b+24
==>b=12
==>a=12+10=22
Joe is 22 years's old
James is 12 years's old.



5 0
3 years ago
An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in California. Suppose that
sergiy2304 [10]

Answer:

(22.0297, 23.3703)

Step-by-step explanation:

Given that an economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in California.

Let X be per capita income (in thousands of dollars) for a major city in California.

Mean = 22.7

n = 183

Population std dev = 6.3

Since population std dev is known we can use Z critical value.

Std error = \frac{6.3}{\sqrt{183} } \\=0.4657

Z critical =1.44

Marginof error = ±1.44*0.4657=0.6706

Confidence interval 85%

=(22.7-0.6703, 22.7+0.6703)\\= (22.0297, 23.3703)

7 0
2 years ago
Find the value of x, y, and z
Lesechka [4]

Answer:

The added values are 180.

Step-by-step explanation:

4 0
3 years ago
Find the product of 2x^(2x2 + 3x + 4)
madam [21]
Answer- 4x⁶ + 6x⁵ + 8x⁴
7 0
3 years ago
Read 2 more answers
What’s the answer? <br> Idk what it is
Aleks [24]

Answer:

B -9/7

Step-by-step explanation:

We need to find a number between

-3 1/3 < x < -4/5

We want a number smaller than between -3 1/3 and -.8

Looking at the choices

-9/7 = - (7/7 + 2/7) = -(1+2/7) = -1 2/7

That is between -3 1/3 and  -4/5

8 0
3 years ago
Read 2 more answers
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