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nalin [4]
3 years ago
7

How do you count by 8s and 7s

Mathematics
1 answer:
galben [10]3 years ago
7 0

Answer:

just add 8+8+8 until you get to the number u want/need and the same with 7. Or you can multiply.

8x1=8

7x1=7

8x3=24        (8+8+8=24)

7x3=21         (7+7+7=21)

etc.


Hope it helps!

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Can someone please answer these questions to help me understand? Please and thank you! Will mark as brainliest!!
Nadya [2.5K]

QUESTION 1  

If a function is continuous at x=a, then \lim_{x \to a}f(x)=f(a)  

Let us find the limit first,  

\lim_{x \to 4} \frac{x-4}{x+5}  

As x \rightarrow 4, x-4 \rightarrow 0,x+5 \rightarrow 9 and f(x) \rightarrow \frac{0}{9}=0  

\therefore \lim_{x \to 4} \frac{x-4}{x+5}=0  

Let us now find the functional value at x=4  

f(4)=\frac{4-4}{4+5} =\frac{0}{9}=0  

Since  

\lim_{x \to 4} f(x)=\frac{x-4}{x+5}=f(4), the function is continuous at a=4.  

QUESTION 2  

The correct answer is table 2. See attachment.


In this table the values of x approaches zero from both sides.


This can help us determine if the one sided limits are approaching the same value.

As we are getting closer and closer to zero from both sides, the function is approaching 2.


The values are also very close to zero unlike those in table 4.


The correct answer is B


QUESTION 3


We want to evaluate;


\lim_{x \to 1} \frac{x^3+5x^2+3x-9}{x-1}


using the properties of limits.


A direct evaluation gives \frac{1^3+5(1)^2+3(1)-9}{1-1}=\frac{0}{0}.


This indeterminate form suggests that, we simplify the function first.


We factor to obtain,


\lim_{x \to 1} \frac{(x-1)(x+3)^2}{x-1}


We cancel common factors to get,


\lim_{x \to 1} (x+3)^2


=(1+3)^2=16


The correct answer is D



QUESTION 4

We can see from the table that as x approaches -2 from both sides, the function approaches -4


Hence the limit is -4.


See attachment


The correct answer is option A

3 0
3 years ago
Why is the answer E?
bearhunter [10]

Step-by-step explanation:

The only way the answer could be E is if the x² term under the radical is supposed to be t².

f(x) = ∫₄²ˣ √(t² − t) dt

f'(x) = √((2x)² − 2x) (2)

f'(x) = 2√(4x² − 2x)

f'(2) = 2√(4(2)² − 2(2))

f'(2) = 2√12

3 0
3 years ago
What is z if 6 = 1/2 z​
torisob [31]
3 is the answe! Hope it helped
8 0
3 years ago
Read 2 more answers
Oscar invests $20,000 in three investments earning 6% ,8% and 10%. He invests $9000 more in the 10% investment than in the 6% in
Hatshy [7]
This problem is mainly concerned with setting up an equation.

let's add the interest rates times their respective investment amounts:

a = (9000 + x)0.10

b = x \times 0.06

c=(20000 - ((9000 + x) + x)) 0.08

simplify:

c = (11000 - 2x) \times 0.08

sum of interest:

1780 = a + b + c

1780 = (9000+x) 0.10 + x 0.06 + (11000-2x)0.08

1780 = 1780 + 0 \times x

0=0

solution:

He does not have any invested in the 6%, while he has 9000 invested at 10% and 11,000 invested at 8%

to check:

9000 \times 0.10 + 11000 \times 0.08

= 900 + 880 = 1780

So this ended up being a trick problem because he does not actually have any invested in the 6% option.
6 0
3 years ago
Select all equations that are true. A. 3 4 − 1 2 = 1 4 B. 9 16 − 4 8 = 5 8 C. 7 8 − 3 4 = 1 8 D. 7 15 − 1 3 = 6 15 E. 1 2 − 1 20
puteri [66]

Answer: A. True  B. False  C. True  D. False  E. False

I took this quiz too, sorry i'm late answering your question but... hope this helps! :D

4 0
2 years ago
Read 2 more answers
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