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3 years ago

-10 + x + 4 - 5 = 7x - 5Step by Step please

Mathematics

2 answers:

poizon [28]3 years ago

4 0

Answer: x=-1

Step-by-step explanation:

−10+x+4−5=7x−5

−10+x+4+−5=7x+−5

(x)+(−10+4+−5)=7x−5(Combine Like Terms)

x+−11=7x−5

x−11=7x−5

Step 2: Subtract 7x from both sides.

x−11−7x=7x−5−7x

−6x−11=−5

Step 3: Add 11 to both sides.

−6x−11+11=−5+11

−6x=6

Step 4: Divide both sides by -6.

−6x

−6

x=−1

kati45 [8]3 years ago

3 0

Answer:

-10 + x + 4 - 5=7x - 5

Combine all like terms (numbers).

-11 + x = 7x - 5

Add 11 to both sides.

x = 7x + 6

Subtract 7x from both sides.

-6x=6

Divide both sides by -6.

x=-1

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2000 yds = __________ miles __________ yds

liraira [26]

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1 mile and 240 yards

Step-by-step explanation:

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3 years ago

You deposited 8500 dollars in a saving account that earns a simple interest rate. what interest rate do you need to be paid if y

V125BC [204]

Answer:

23.75%

Step-by-step explanation:

Use formula

$I=P\cdot r\cdot t,$

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In your case,

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6 0

4 years ago

Please help me ASAP thank uu

ZanzabumX [31]

Answer:

51°

Step-by-step explanation:

Remember, all 3 angles must add up to 180°

We can tell that this triangle is a right triangle, or a triangle that has a 90° angle. We also have another angle given, which is 39°. Currently we have two angles given.

Since all 3 angles have to add up to 180°,

90 + 39 + x = 180°

129 + x = 180°

180 - 129 = x

x = 51°

The missing angle is 51°

To see if your calculation is correct, you could add all 3 angles, and it should give you 180 as a sum.

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Correct!

4 0

3 years ago

An article describes the chemical compositions of certain minerals in the early Archaean mantle. For a certain type of olivine a

Ket [755]

Answer:

The mean is 40.35 and the standard deviation is 0.13.

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a certain type of olivine assembly, the silicon dioxide (SiO2) content (in weight percent) in a randomly chosen rock has mean 40.35 and standard deviation 0.4.

Sample of 10:

By the Central Limit Theorem, the mean is 40.35, and the standard deviation is $s = \frac{\sigma}{\sqrt{n}} = \frac{0.4}{\sqrt{10}} = 0.13$