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OLga [1]
3 years ago
10

Answer both questions please ! Question 7 D is cut off D. 2110.1

Mathematics
1 answer:
ANTONII [103]3 years ago
5 0
The answers are B and D
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-7t^2 – 2t + 9 = 0<br> pls solve using any method!
Aneli [31]
-7t^2 - 2t + 9 = 0\\&#10;-7t^2+7t-9t+9=0\\&#10;-7t(t-1)-9(t-1)=0\\&#10;-(7t+9)(t-1)=0\\&#10;t=-\dfrac{9}{7} \vee t=1
8 0
3 years ago
HELP ME OUT how to I Graph 12 + 8y &lt; -20 on a lumber line
Vedmedyk [2.9K]

Answer:

Checkout the screenshot below the explanation.

Step-by-step explanation:

1. First, we have to simplify the inequality.

Step 1: Subtract 12 from both sides.

  • 8y + 12 - 12 < -20 - 12
  • 8y < -32

Step 2: Divide both sides by 8.

  • \frac{8y}{8}  < \frac{-32}{8}
  • y < -4

2. Now that we simplified our inequality down to y < -4, that means that all the values of y are less than -4.

6 0
3 years ago
Jeff is baking a cake. The recipe says that he has to mix 32 grams of vanilla powder to the flour.
sergeinik [125]

If 1 cup of that particular vanilla powder has a mass of 128 grams, then \dfrac{2}{3} of a cup of vanilla powder has a mass of

\dfrac{2}{3} \cdot 128=\dfrac{256}{3}=85\dfrac{1}{3} grams.

Since

85\dfrac{1}{3}-32=53\dfrac{1}{3} grams and \dfrac{5}{12} of a cup of vanilla powder is

\dfrac{5}{12}\cdot 128=\dfrac{5\cdot 128}{12}=\dfrac{5\cdot 32}{3}=\dfrac{160}{3}=53\dfrac{1}{3},

then correct answer is that he went over by  \dfrac{5}{12}  of a cup.

Answer: correct choice is B.


3 0
3 years ago
Read 2 more answers
THE IMAGE DOWN BELOW MATH PLEASE HELP ME WITH THIS ALEGEBRA IM CRYING YALL
Fittoniya [83]

Answer:

25% increase

Step-by-step explanation:

final value (20) -minus- starting value (16)

-------------------divided by ----------------             times * 100

starting value (20)

4

---  x 100

20

25%

4 0
2 years ago
Part A: Find a rational number that is between 5.2 and 5.5. Explain why it is rational. (2 points) Part B: Find an irrational nu
max2010maxim [7]
A rational number can always be represented as a fraction.
5.2 = 52/10 
5.5 = 55/10

A number between them would be 54/10 since 54 is between 52 and 55.

An irrational number cannot be represented as a fraction. A good example of an irrational number is the square root of a number.
sqrt(5.2^2) = 5.2  ----> 5.2^2 = 27.04
sqrt(5.5^2) = 5.5  ----> 5.5^2 = 30.25

The square root of a number between 27.04 and 30.25 will be an irrational number between 5.2 and 5.5
sqrt(28) = 5.2915...
3 0
2 years ago
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