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Semenov [28]
3 years ago
6

Determine whether(-8,-3) is a solution of 2x -8=1 is (-8,-3) a solution to the equation ?

Mathematics
1 answer:
Blababa [14]3 years ago
8 0

Answer:

No

Step-by-step explanation:

(-8,-3) does not land on the line 2x-8=1

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2x2-50=0 me ajudem por favor e pra amanha
Semenov [28]

Answer: -46

Step-by-step explanation: First you would do 2 x 2 because of Pemdas and the answer to that is 4 and when you subtract 4 from 50 you get -46

8 0
3 years ago
A pizza had 9/10 left before Lucas ate 4/5 of the pizza. How much pizza is left over
Norma-Jean [14]
1/10 is left.

Explanation:

First we need to find a common denominator. Since 5×2=10, if we multiply 4/5 by 2/2, we will be able to subtract that from 9/10.

4/5×2/2= 8/10. Then if we subtract that from the 9/10 left of the pizza, we get 1/10, the amount remaining.

Hope this helps :)
8 0
3 years ago
Read 2 more answers
Look at this equation: f(x)=7sin(6x)+2 . What number represents the horizontal compression?
Natalka [10]

Answer:

6

Step-by-step explanation:

8 0
3 years ago
10 binder; 60% off; 6% tax
laila [671]

Answer:

I'm going to assume that the binder is $10, and that the tax is applied after the 60% off, in which case the answer is $4.24

Step-by-step explanation:

10 * 10 = 100

6 * 10 = 60

10 - 6 = 4

6 / 25 = 0.24

4 + 0.24 = 4.24

Answer: $4.24

4 0
3 years ago
A one­sided test of a hypothesis, based on a sample of size 9, yields a P­value of .035. Which of the following best describes t
lana [24]

Answer:

1.86 < t < 2.31

Step-by-step explanation:

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean height actually is higher\lower than an specified value, the system of hypothesis would be:  

Null hypothesis:\mu \leq \mu_o  

Alternative hypothesis:\mu > \mu_o

Or like this:

Null hypothesis:\mu \geq \mu_o  

Alternative hypothesis:\mu < \mu_o

If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic

We don't know on this case the calculated value and with the p value we can find it.

P-value

The first step is calculate the degrees of freedom, on this case:  

df=n-1=9-1=8  

Since is a one side test the p value would be:  

p_v =P(t_{(8)}>t_o)=0.035

And we can find the critical value with the following excel code:

" =T.INV(1-0.035,8)" and we got t_p =2.09

And cannot be a lower tail test since all the options have positive values for the statistic. So on this case the best option is:

1.86 < t < 2.31

8 0
4 years ago
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