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3 years ago

14

For a school fundraiser, Mai will make school spirit bracelets. She will order bead wiring and alphabet beads to create the brac

elets. Mai must spend $250 on wire and $5.30 per bracelet for beads. Write an expression for this situation.

1 answer:

sergejj [24]3 years ago

6 0

250+5.30x= y ( x is the number or bracelets she sells and y is the total cost)

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Twenty words were randomly selected from two textbooks. Each set gives the number of letters in each of the twenty words for tha

Alborosie

Answer:

k = 13The smallest zero or root is x = -10

Step-by-step explanation:

you can write "x^2" to mean "x squared"

f(x) = x^2+3x-10

f(x+5) = (x+5)^2+3(x+5)-10 ... replace every x with x+5

f(x+5) = (x^2+10x+25)+3(x+5)-10

f(x+5) = x^2+10x+25+3x+15-10

f(x+5) = x^2+13x+30

Compare this with x^2+kx+30 and we see that k = 13

Factor and solve the equation below

x^2+13x+30 = 0

(x+10)(x+3) = 0

x+10 = 0 or x+3 = 0

x = -10 or x = -3

The smallest zero is x = -10 as its the left-most value on a number line.

7 0

3 years ago

A poll asked 1057 American adults if they believe there was a conspiracy in the assassination of President Kennedy, and found th

AVprozaik [17]

Answer:

The 95% confidence interval of the proportion of Americans who believe in the conspiracy is $0.551< p < 0.610$

Step-by-step explanation:

From the question we are told that

The sample size is n =1057

The number that believe there was a conspiracy is k = 614

Generally the sample proportion is mathematically represented as

$\^ p = \frac{614}{1057 }$

=> $\^ p = 0.5809$

From the question we are told the confidence level is 95% , hence the level of significance is

$\alpha = (100 - 95 ) \%$

=> $\alpha = 0.05$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 1.96$

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \sqrt{\frac{\^ p (1- \^ p)}{n} }$

=> $E = 1.96 * \sqrt{\frac{0.5809 (1- 0.5809)}{1057} }$

=> $E = 0.02975$

Generally 95% confidence interval is mathematically represented as

$\^ p -E < p < \^ p +E$

=> $0.5809 - 0.02975< p < 0.5809 + 0.02975$

=> $0.551< p < 0.610$

4 0

3 years ago

you can see that there is 8 cm in middle of the trapezoid. above the trapezoid, it says 6 cm, below the trapezoid, it says 11 cm

aniked [119]

Answer:

The measure of the longer base is:

9 centimeters

Step-by-step explanation:

We know that the area of a trapezoid with height h and two parallel bases b and b' is given by the formula:

Here we have:

The area of a trapezoid is 30 square centimeters. The height is 4 centimeters. The shorter base measures 6 centimeters.

i.e.

Step-by-step explanation:

6 0

3 years ago

-8 - 3x = 19<br> What is the answer

iogann1982 [59]

First, move like terms on one side. Next, add them and divide. See the attachment for solution.

4 0

3 years ago

Read 2 more answers

If 10^2y = 25, then 10^-y equals:<br>(a) -1/5<br>(b) 1/625<br>(c) 1/50<br>(d) 1/25<br>(e) 1/5

Gemiola [76]

<h3><u>given</u><u>:</u></h3>

<u> $10 ^{2y} = 25$ </u>

<h3><u>to</u><u> </u><u>find</u><u>:</u></h3>

<u> ${10}^{y} = .......$ </u>

<h3><u>solution</u><u>:</u></h3>

<u> $10 ^{2y} = 25$ </u>

<u> $(10y {)}^{2} = {5}^{2}$ </u>

<u> $10y = 5$ </u>

<u> $\frac{1}{ {10}^{y} } = \frac{1}{5}$ </u>

<u> ${10}^{ - y} = \frac{1}{5}$ </u>

<u>therefore</u><u>,</u><u> </u><u>the</u><u> </u><u>correct</u><u> </u><u>answer</u><u> </u><u>is</u><u> </u><u>option</u><u> </u><u>E</u><u>.</u>

8 0

2 years ago

Read 2 more answers