Would someone help me understand this type of math

Mathematics

1 answer:

Svetlanka [38]3 years ago

6 0

I never understand that

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The area of a desk top is 8 ¾ square feet. If the length is 3 ½ft., find the width.

kirill [66]

Area is calculated as length times width.
A = lw
Is the area and length are known, then you can plug in their values and isolate w to find the width.
I find it easiest to convert to decimals rather than using mixed numbers.
8 ¾ = 8.75 (area)
3 ½ = 3.5 (length)
Now let's plug in the values.
8.75 = 3.5w
To isolate w, just divide both sides by 3.5.
8.75 / 3.5 = 2.5
This means w = 2.5.
So the width is 2.5 feet.
Now convert the decimal back to a mixed number.
2.5 = 2 ½

So the answer to this question is that the width is 2.5, or 2 ½.

Hope this helps!

4 0

3 years ago

write the equation of the line with a slope of 10 that goes through the Point (8,-2) in slope intercept Point slope form

gladu [14]

Answer:

y = mx + c

-2 = 10(8) + c

-2 = 80 + c

c = - 82

y = 10x - 82

5 0

3 years ago

I need help Thx guys

Evgesh-ka [11]

Plugging in the numbers 7x - 2y = 39 fitted and made sense

8 0

3 years ago

Read 2 more answers

Hannah notices that segment HI and segment KL are congruent in the image below: Two triangles are shown, GHI and JKL. G is at ne

BlackZzzverrR [31]

Answer:

segment IG ≅ segment LJ

Step-by-step explanation:

Please refer to the attached image as per the triangles as given in the question statement.

$\triangle HGI, \triangle JKL$

$G\left(-3,1\right),\ H\left(-1,1\right),\ I\left(-2,3\right)$

$J\left(3,3\right),K\left(1,3\right),L\left(2,1\right)$

Given that:

$HI\cong KL$ and

$\angle I \cong \angle L$

SAS congruence between two triangles states that two triangles are congruent if two corresponding sides and the angle between the two sides are congruent.

We are given that one angle and one sides are congruent in the given triangles.

We need to prove that other sides that makes this angle are also congruent.

To show the triangles are congruent i.e. $\triangle GHI \cong \triangle JKL$ by SAS congruence we need to prove that