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3 years ago

10

FIRST PERSON TO ANSWER GETS BRAINLIEST!!! Matty planted flowers in her garden. She planted 12 petunias, 12 marigolds, 9 geranium

s, and 4 rose bushes. 1. Write an expression for the number of geraniums and marigolds. 2. Write an expression for the number of petunias and rose bushes.

1 answer:

Nutka1998 [239]3 years ago

8 0

Answer:1. 12+9=21 2. 12+4=16

Step-by-step explanation:

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Can someone help on these two questions

notsponge [240]

(x-1)(x-1)
=x^2-x-x+1
=x^2-2x+1

(x+7)(x-7)
=x^2-7x+7x-49
=x^2-49

3 0

3 years ago

Marty’s mom is applying for a job as a secretary. Part of the job involves being able to type. If Marty’s mom knows she can type

ArbitrLikvidat [17]

Step-by-step explanation:

do 425÷5 and you will get your answer

5 0

4 years ago

Read 2 more answers

Giving brainliest please help and understand this step by step

MA_775_DIABLO [31]

Answer:

$3,813.33 \: {cm}^{3}$

Step-by-step explanation:

Volume of the space that is not occupied = Volume of cube shaped box - volume of soccer ball

$= {20}^{3} - \frac{4}{3} \times 3.14 \times {10}^{3} \\ \\ = 8000 - \frac{4}{3} \times 3.14 \times 1000 \\ \\ = 8000 - \frac{4}{3} \times 3140 \\ \\ = 8000 - \frac{12560}{3} \\ \\ = 8000 - 4,186.66667 \\ \\ = 3,813.33333 \\ \\ = 3,813.33 \: {cm}^{3}$

5 0

3 years ago

boyakko [2]

Answer:

1) The value of c is given by

$c=4$

2) The value of k is given by

$k=-4150$

Step-by-step explanation:

Given that function g is defined by $g(x)=cx-3$ , where c is a constant.

To find c:

Also given that value of g(x) at x=0.5 is equal to -1

ie., $g(0.5)=-1$

At x=0.5

$g(0.5)=c(0.5)-3=-1$

$(0.5)c-3=-1$

$(0.5)c=-1+3$

$(0.5)c=2$

$c=\frac{2}{0.5}$

$c=\frac{2}{\tfrac{1}{2}}=2\times \frac{2}{1}$

Therefore $c=4$

2) Given that function h is defined by $h(x)=\frac{20x-k}{x+50}$ , where k is a constant.

To find k:

Also given that value of h(x) at x=20 is equal to 65

ie., $h(20)=65$

At x=20

$h(20)=\frac{20(20)-k}{20+50}=65$

$400-k=65(70)$

$-k=4550-400$

$-k=4150$

Therefore $k=-4150$

6 0

3 years ago

The union for a particular industry has determined that the standard deviation of the daily wages of its workers is $20. A rando

Sergeeva-Olga [200]

Answer:

The 90% confidence interval for the true mean daily wage of all union workers in the industry is ($118.6, $125.4). The lower limit is $118.6 and the upper limit is $125.4.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.05 = 0.95$ , so Z = 1.645.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.645\frac{20}{\sqrt{90}} = 3.4$

The lower end of the interval is the sample mean subtracted by M. So it is 122 - 3.4 = $118.6

The upper end of the interval is the sample mean added to M. So it is 122 + 3.4 = $125.4

The 90% confidence interval for the true mean daily wage of all union workers in the industry is ($118.6, $125.4). The lower limit is $118.6 and the upper limit is $125.4.

4 0

3 years ago