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Andrej [43]
2 years ago
8

Please help me need to revise for a testtt!!!!

Mathematics
2 answers:
LekaFEV [45]2 years ago
5 0
You need to collect the like terms (aka the letters) so 3a-5a goes together to give -2a and 2w-9w which gives -7w so the answer is -2a-7w
LUCKY_DIMON [66]2 years ago
3 0
Remember you can add like terms exg, 3y+4y=7y 3y^2+4y^2=7y^2, but cannot add 3y^2 and 4y, or 3 and 4y so

3a+2w-5a-9w
group like trems
3a-5a+2w-9w
subtract
-2a-7w


3y^2+2w^2-y^2-w^2
group like terms (think of w^2 and y^2 as 1w^2 and 1y^2)
3y^2-y^2+2w^2-w^2
subtract
2y^2+w^2

2x+2x=4x
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A manufacturer of banana chips would like to know whether its bag filling machine works correctly at the 421 gram setting. It is
Anastaziya [24]

Answer:

The p-value is approximately 0.0508

Step-by-step explanation:

The given parameters are;

The expected mass of banana chips bag filled by the machine, μ = 421 gams

The number of bags in the sample of bags filled by the machine, n = 26 bags

The mean mass of the bags in the sample, \overline x = 413 grams

The standard deviation of the mass in the bags, s = 24 grams

The level of significance, α = 0.02

The null hypothesis, H₀; μ = 421 grams

The alternative hypothesis, Hₐ; μ < 421 grams

The test statistic is given as follows;

t=\dfrac{\bar{x}-\mu }{\dfrac{s}{\sqrt{n}}}

We get;

t=\dfrac{413-421 }{\dfrac{24}{\sqrt{26}}} \approx -1.6996731712

The t-value = -1.6996731712

The degrees of freedom df = n - 1 = 26 - 1 = 25

From an online source, we get the critical-t =  2.166587

The p-value is obtained using an online source as p(t ≤  -1.6996731712) = 0.0508

From the p-value table, we get

0.05 < p < 0.1

3 0
2 years ago
What is 52,000,000 × 706,000? A) 36712 × 10 13 B) 36712 × 10 12 C) 3.6712 × 10 13 D) 3.6712 × 10 14
Anna [14]
The answer is b its easy i had this one

3 0
3 years ago
A small hard drive measured 0.7553 centimeters across round to the nearest tenth
Alborosie

Answer:

0.8

Step-by-step explanation:

7 is in the tenth place since there is a 5 in the hundreds we round up to 8.

hope this helped =3

4 0
3 years ago
The triangle will be dilated by a scale factor of 1.5. (a) Calculate the length of each side of the dilated image. (b) Draw the
VLD [36.1K]
To find the new sides take the original sides and multiply it by the scale factor

12 * 1.5 = 18
10 * 1.5 = 15
14 * 1.5 = 21

So the new sides are 18, 15, 21.  And they correspond to the 12, 10, and 14 respectively

3 0
3 years ago
What expression is equivalent to 3(2t + 6) -4t
tekilochka [14]

Answer: 2t + 18

Step-by-step explanation:

3 0
3 years ago
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