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3 years ago

Please i will give brainly

Mathematics

2 answers:

d1i1m1o1n [39]3 years ago

8 0

A:x+3=11
B:X(to the power of 3) + 9
C:x-7=7
D:x(to the power of 3) = 3

serg [7]3 years ago

3 0

Equation for a
3x+11

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One third of a bird eggs hatched. If 2 eggs hatched , how many eggs did the bird lay

VLD [36.1K]

Answer:

6 eggs

Step-by-step explanation: you need to divide 2 by one-third. So, set it up. 2/1 divided by 1/3. The method I use is keep, change, flip. Keep 2/1, and flip 1/3 to 3/1. Now you have 2/1 multiplied by 3/1 which is 6.

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3 years ago

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Which two movements will show a positive movement?

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Answer:
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3 years ago

Lee sells electronics. He earns a 5% commission on each sale he makes.

NISA [10]

Answer:

a) c = (5/100)*d

b) c = 0.05*d

c) The ratio between what Lee recieves and what he sold.

d) d = 2000

Step-by-step explanation:

Since Lee earns 5% in commission for each sale then:

a) c = (5/100)*d

b) c = 0.05*d

c) In this context the constant of proportionality means the ratio of the value Lee sold that he'll earn as a comission.

d) Since he wants to earn $100, then c = 100 and we solve for d

c = 0.05*d

100 = 0.05*d

0.05*d = 100

d = 100/0.05 = $2000

He needs to sell $2000.

3 0

3 years ago

To determine whether the means of two populations are equal,

worty [1.4K]

Answer:

The correct option is C. either a t test or an analysis of variance can be performed.

Step-by-step explanation:

Consider the provided information.

The t-test, is used for whether the means of two groups are equal or not. The assumption for the test is that both groups are sampled from normal distributions with equal variances.

Analysis of Variance (ANOVA) is a statistical method evaluating variations between two or more methods. ANOVA is used in a study to analyze the gaps between group methods.

ANOVA is used not for specific differences between means, but for general testing.
The chi-squared test is often used to evaluate whether there was a significant difference in one or more groups between the predicted frequencies and the observed frequencies.

Hence, Either a t test or an analysis of variance can be performed to determine whether the means of two population are equal.

Therefore, the correct option is C. either a t test or an analysis of variance can be performed.

4 0

3 years ago

The rectangle below has an area of x² – 6x – 7 square meters and a width of 3 – 7 meters.

natta225 [31]

Answer:

The expression which represent the length of the rectangle is x + 1

Step-by-step explanation:

Given as :

The Area of rectangle = x² - 6 x - 7 square meters

The width of the rectangle = w = x - 7 meters

Let The length of rectangle = L meters

Now, <u>According to question</u>

∵ Area of Rectangle = Length × width

or, x² - 6 x - 7 meters² = L meters × w meters

or, x² - 6 x - 7 = L × (x - 7)

or, x² - 7 x + x - 7 = L × (x - 7)

or, x (x - 7) + 1 (x - 7) = L × (x - 7)

or, (x - 7) (x + 1) = L × (x - 7)

∴ L = $\frac{(x - 7)\times (x + 1)}{(x - 7)}$

I,e L = x + 1

So, The length of rectangle = L = x + 1

Hence,The expression which represent the length of the rectangle is x + 1 Answer

8 0

3 years ago