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3 years ago

5x + 1 = 56 Solving 2 step equations?

Mathematics

1 answer:

frutty [35]3 years ago

4 0

Answer:

the x would equal to 11 ,so x=11

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An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in Texas. He believes that

tankabanditka [31]

Answer:

1442

Step-by-step explanation:

Given,

Mean is,

$\mu = 20.4$

Standard deviation,

$\sigma = 8.8$ ,

Margin of error(E) = 0.54,

For 98% level of confidence, $z_{\frac{\alpha}{2}} = 2.33$

Thus, the sample size would be,

$n=[\frac{z_{\frac{\alpha}{2}}\times \sigma}{E}]^2$

$=[\frac{2.33\times 8.8}{0.54}]^2$

$=1441.74902606$

$\approx 1442$

6 0

3 years ago

What are the solution(s) to the quadratic equation 40 - x2 = 0?

Julli [10]

Answer:

x = ±2√10

Step-by-step explanation:

40 - x² = 0

⇌

(√40 - x)(√40 + x) = 0

⇌

x = √40 or x = -√40

we can go further and say that √40 = 2√10

5 0

4 years ago

Think about Digit's game of spinning the spinner.

saul85 [17]

Answer:

Should be P(A∩B)=P(A)⋅P(B)

6 0

3 years ago

Below are \triangle ABC△ and \triangle DEF△DEFtriangle, D, E, F. We assume that AB=DEAB=DEA, B, equals, D, E, BC=EFBC=EFB, C, eq

Novay_Z [31]

Answer:

(A) AB = DE and segments with same length are congruent

Step-by-step explanation:

Justification of step 1 is based on the congruence of segments AB and DE.

<u>Therefore correct choice is the first one:</u>

(A) AB = DE and segments with same length are congruent

5 0

3 years ago

Read 2 more answers

A bag has 5 blue marbles, 3 red marbles, and 2 green marbles. We draw two marbles, one at a time, with replacement. What is the

VMariaS [17]

Answer: $\frac{1}{10}$

<u>Step-by-step explanation:</u>

Blue = 5, Red = 3, Green = 2, Total = 10

Probability = First draw and Second draw

= $\frac{5}{10}$ x $\frac{2}{10}$

= $\frac{10}{100}$

= $\frac{1}{10}$

6 0

3 years ago