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2 years ago

Select all that apply, 7th grade math

Mathematics

2 answers:

lana [24]2 years ago

7 0

All except 0. The inequality is saying that x must be less than or equal to 3 which all answers except 0 are.

Lorico [155]2 years ago

7 0

Hi!

Your answer to this question would be every option except for 0.

This is because the question is saying: x is less than or equal to negative 3.

Thus, you answer, all options except 0

Have a wonderful/night!

God bless!

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An architect is using the scale 10 feet = 1 inch. If the actual length of the room 65 feet, what will be the length of the scale

kolezko [41]

Answer:

6.5 inches

Step-by-step explanation:

you would divide 65 by 10 feet to get the answer in inches which is 6.5

6 0

3 years ago

Ok some one ask me what 20 + 20 - 20 is said its 20 e didnt belive me i know thats the right anser

postnew [5]

Answer:

it is because 20 + 20 is 40 and then 40 - 20 = 20

6 0

3 years ago

Are the two parabolas defined below similar or congruent or both? Justify your reasoning. Parabola 1: The parabola with a focus

Dominik [7]

Answer:

They are similar by a factor of 14

Step-by-step explanation:

From the general equation of a parabola opening up (since the directrix is on the y axis and the focus is upwards this line) the focus coordinates are:

$Focus = (h,k+p) = (0,2)$

So h=0 and k+p=2, for the directrix:

$y = k-p=-4$

solving k and p from the two equations above:

$k=-1 and p=3$

So for Parabola 1 the equation would be:

$x^{2} =4*3(y+1)$

For Parabola 2 the general equation is:

$x^{2} =4*(3/2)(y)$

here h=0, k=0, p=3/2 so focus is (0,3/2), directix is y=-3/2, they have the same orientation.

they are not congruent. For them to be similar it must comply:

$x_{1}=k x_{2}\\y_{1}=ky_{2} => (1/12)x_{1} ^{2} -1 = k(1/6)x_{2} ^{2}$

replacing $x_{1}$ and solving for k:

$(1/12)(kx_{2}) ^{2} -1 = k(1/6)x_{2} ^{2}\\ (1/12)k^{2} x_{2}^{2}-1 = k(1/6)x_{2} ^{2}\\k-12 = (12/6)=2\\k = 2+12=14\\$

They are similar by a factor of 14

8 0

3 years ago

phoenix is a businessman who travels frequently he uses atms in many cities and does not write many checks he also uses direct d

liubo4ka [24]

Answer:

Bank 3

Step-by-step explanation:

No additional charges for automatic deposit and includes saving account.

3 0

3 years ago

Please show work if you do, ( and get it right) I will make you brainliest!!!

DerKrebs [107]

Answer:

The percentage increase in bird population in the second years is 4% .

Step-by-step explanation:

Given as :

During two years, the population of birds of an island became 7 times more than before.

The the percentage increase in first year = = $r_1$ =40%

Let The percentage increase in second year = $r_2$ = r%

So, According to question

The initial population of bird = x

The increase population of bird =7 times before = 7 x

Now,

The increase population of bird = initial population of bird × (1+ $\dfrac{r_1}{100}$ ) × (1+ $\dfrac{r_2}{100}$ )

Or, 7 x = x × (1+ $\dfrac{40}{100}$ ) × (1+ $\dfrac{r}{100}$ )

Or, $\dfrac{7 x}{x}$ = 1.4 × (1+ $\dfrac{r}{100}$ )

Or, 7 = 1.4 × (1+ $\dfrac{r}{100}$ )

Or, $\dfrac{7 }{1.4}$ = (1+ $\dfrac{r}{100}$ )

Or, 5 = (1+ $\dfrac{r}{100}$ )

Or, (1+ $\dfrac{r}{100}$ ) = 5

Or, $\dfrac{r}{100}$ = 5 - 1

Or, $\dfrac{r}{100}$ = 4

∴ r = 4 × 100

I.e r = 400

so, The percentage increase = r% = 4

Hence The percentage increase in bird population in the second years is 4% . Answer

3 0

3 years ago