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3 years ago

Solve 2x - 3 = 1 help please

Mathematics

2 answers:

raketka [301]3 years ago

5 0

Answer:

first add 3 to both sides to get rid of the three on the left side

2x = 4

then divide 2 from both sides since it is the opposite of the operation shown then you'll get x = 2 when dividing to on the left side you get rid of it because you are trying to get rid of as much of the numbers as possible.

Talja [164]3 years ago

3 0

Answer:

X=2

Step-by-step explanation:

1). cancel the -3 out on both sides of the equation

2). When you add together the 1 and 3, you will recieve the value of 4

3).In order to get the x attached to the coefficient 2 isolated you have to divide 2 on both sides

4.) 2x = 4

5). 2x/2 = x

6). 4/2 = 2

Therefore x=2

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Please help me thanks!

IrinaK [193]

Answer:

See below ~

Step-by-step explanation:

Formula for area of a triangle :

Area (triangle) = 1/2 × base × height

=============================================================

Solving :

Triangle 1 (Top Left)

⇒ Area = 1/2 × 11 × 3

⇒ Area = 33/2

⇒ Area = 16.5 in²

Triangle 2 (Top Right)

⇒ Area = 1/2 × 8 × 7.2

⇒ Area = 4 × 7.2

⇒ Area = 28.8 cm²

Triangle 3 (Bottom Left)

⇒ Area = 1/2 × (5.5 + 5) × 10.4

⇒ Area = 10.5 × 10.4

⇒ Area = 109.2 m²

Triangle 4 (Bottom Right)

⇒ Area = 1/2 × (2 + 7) × 5.5

⇒ Area = 9 × 2.75

⇒ Area = 24.75 in²

4 0

2 years ago

A quadrilateral with only two opposite sides perpendicular to one side

aliina [53]

Answer:

The quadrilateral is a trapezium as two of its opposite sides are perpendicular to one side. Rectangle is also a type of trapezium and so is a square

Hope this helps!

8 0

3 years ago

96 penicals come in a box if 4teachers share 3boxes equally how many penicals does each teacher receive

IrinaVladis [17]

Answer:

Step-by-step explanation:

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3 years ago

Read 2 more answers

Arandom sample of n1 =12 students majoring in accounting in a college of business has a mean grade-point average of 2.70 (where

antiseptic1488 [7]

Answer:

We accept the null hypothesis that the mean gpa's are equal, with the 5 percent level of significance.

Step-by-step explanation:

We have these following hypothesis:

Null

Equal means

$\mu_{1} = \mu_{2}$

Alternative

Different means

$\mu_{1} \neq \mu_{2}$

Our test statistic is:

$\frac{\overline{Y_{1}} - \overline{Y_{2}}}{\sqrt{\frac{s_{1}^{2}}{N_{1}} + \frac{s_{2}^{2}}{N_{2}}}}$

In which $\overline{Y_{1}}, \overline{Y_{2}}$ are the sample means, $N_{1}, N_{2}$ are the sample sizes and $s_{1}, s_{2}$ are the standard deviations of the sample.

In this problem, we have that:

$\overline{Y_{1}} = 2.7, s_{1} = 0.4, N_{1} = 12, \overline{Y_{2}} = 2.9, s_{2} = 0.3, N_{2} = 10$

$T = \frac{2.7 - 2.9}{\sqrt{\frac{0.4}^{2}{12} + \frac{0.3}^{2}{10}}} = -1.3383$

What to do with the null hypothesis?

We will reject the null hypothesis, that is, that the means are equal, with a significante level of $\alpha$ if

$|T| > t_{1-\frac{\alpha}{2},v}$

In which v is the number of degrees of freedom, given by

$v = \frac{(\frac{s_{1}^{2}}{N_{1}} + \frac{s_{2}^{2}}{N_{2}})^{2}}{\frac{\frac{s_{1}^{2}}{N_{1}}}{N_{1}-1} + \frac{\frac{s_{2}^{2}}{N_{2}}}{N_{2} - 1}}$

Applying the formula in this problem, we have that:

$v = 20$

So, applying t at the t-table at a level of 0.975, with 20 degrees of freedom, we find that

$t = 2.086$

We have that

$|T| = 1.3383$

Which is lesser than t.

So we accept the null hypothesis that the mean gpa's are equal, with the 5 percent level of significance.

7 0

3 years ago

How do you find the lateral area of the prism

Lina20 [59]

Hi there!

The lateral area is the area of the figures connecting the bases. We have rectangles here. We'll need to find the area of each figure and add them together to find the lateral area.

WORK:
(2.8 x 12) + (8.1 x 12) + 2(4 x 12)
33.6 + 97.2 + 96
LA = 226.8 units^2

Hope this helps!! :)
If there's anything else that I can help you with, please let me know!

7 0

4 years ago

Solve 2x - 3 = 1 help please​

Solve 2x - 3 = 1 help please