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Mademuasel [1]
3 years ago
8

Which inequalities have no solution? Check all of the boxes that apply.

Mathematics
1 answer:
RUDIKE [14]3 years ago
7 0

Answer:

Step-by-step explanation:

X>X

-4+X>-2+X

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The amount, A, in milligrams, of radioactive material remaining in a container can be modeled by the exponential function A(t) =
lisov135 [29]

Answer: 4 years


Step-by-step explanation:

A(0) has to be amount at start. Assume that's 5mg

Then A(t) = 5×(0.5)^(0.25t) = 5×2^(-t/4),

(also known as 5 exp(-λ t) with λ = ln(2)/4, incidentally).


We need to such that A(t) = 2.5mg, or 2^(-t/4) is 1/2, which happens when -t/4 is -1, or t is 4.



4 0
3 years ago
David is making rice for his guests based on a recipe that requires rice, water, and a special blend of spice, where the rice-to
Elodia [21]

Answer:

The price of rice per gram is 0.006$

Step-by-step explanation:

I. David wants to make 10 servings,

each require 75 g of rice and 5 spice. When ratio is 15:1

If rice : spice = 75 : x

15x = 75

x = 5

=> 5 * 15 : 1 * 5

= 75 : 5

So rice : spice is  75 : 5

II. When 1 serving require 75 : 5

So 10 servings is 10 * 75 : 5 * 10

= 750 : 50

So he must has 750 grams rice and 50 grams spice.

III. He must buy spice and rice which..

a) He has 40 grams spice, he'll buy for 10 grams spice.

b) He has no rice, he'll buy for 750 grams rice.

But the question only ask for price of rice which he spend 4.5$

=  \frac{4.5}{750}

= 0.006$

In 1 gram of rice he spend 0.006$

If 750 grams of rice, he'll spend 750 * 0.006$ = 4.5$ => true

That makes 0.006$ is the right answer.

Hope that help :)

8 0
2 years ago
I will marke brainliest. what is If 1=3
pogonyaev

Answer:

  • 3

Step-by-step explanation:

<u>Count the number of letters</u>

  • 1 = one ⇒ 3 letters
  • 2 = two ⇒ 3 letters
  • 3 = three ⇒ 5 letters
  • 4 = four ⇒ 4 letters
  • 5 = five ⇒ 4 letters
  • 6 = six ⇒ 3 letters
3 0
2 years ago
Read 2 more answers
If x^2-13x+42=(x+A)(x+B), then find the value of 3A-B
tigry1 [53]

Answer:

- 11 or - 15

Step-by-step explanation:

Factorise

x² - 13x + 42

Consider the factors of the constant term (+ 42) which sum to give the coefficient of the x- term (- 13)

The factors are - 6 and - 7, since

- 6 × - 7 = + 42 and - 6 - 7 = - 13, thus

x² - 13x + 42 = (x - 6)(x - 7)

compare to (x + A)(x + B)

A = - 6, B = - 7

thus 3A - B = 3(- 6) - (- 7) = - 18 + 7 = - 11

The factors may also be expressed as (x - 7)(x - 6)

with A = - 7 and B = - 6, then

3A - B = 3(- 7) - (- 6) = - 21 + 6 = - 15

5 0
3 years ago
5.
Talja [164]

Answer:

y = -3x

Step-by-step explanation:

Given the illustration of the graph, we can see that the line is going downhill.  This would indicate that the slope is negative, so the choices would be narrowed down y = -3x or y = -x.  Looking at the line, we can use two points to find the difference in 'y' over the difference in 'x', or slope.  Using the origin (0,0) as one point, we can go down 3 and over 1 to get to the second point of (1, -3).  This would be an overall change of -3, giving us the final answer of:

y = -3x

5 0
3 years ago
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