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UkoKoshka [18]
3 years ago
10

Helpppppppp plzzzzzzzzzzzzzzzzzzzz

Mathematics
2 answers:
Luden [163]3 years ago
5 0
Fourteen square units
kari74 [83]3 years ago
5 0

Answer:

14 sq units

Step-by-step explanation:

2 units by 7 units is 14 square units

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Help with 21 would be much appreciated.
umka2103 [35]

Answer:

\large\boxed{x=2\sqrt{21}\ and\ y=4\sqrt3}

Step-by-step explanation:

Look at the picture.

ΔADC and ΔCDB are similar. Therefore the sides are in proportion:

\dfrac{AD}{CD}=\dfrac{CD}{DB}

We have

AD=14-8=6\\CD=y\\DB=8

Substitute:

\dfrac{6}{y}=\dfrac{y}{8}         <em>cross multiply</em>

y^2=(6)(8)

y^2=48\to y=\sqrt{48}\\\\y=\sqrt{16\cdot3}\\\\y=\sqrt{16}\ cdot\sqrt3\\\\\boxed{y=4\sqrt3}

For x use the Pythagorean theorem:

x^2=6^2+(4\sqrt3)^2\\\\x^2=36+48\\\\x^2=84\to x=\sqrt{84}\\\\x=\sqrt{4\cdot21}\\\\x=\sqrt4\cdot\sqrt{21}\\\\\boxed{x=2\sqrt{21}}

3 0
3 years ago
IM REALLY CONFUSED!??? giving away 20pts!!
Olenka [21]

Answer:

A. y = -12.5 + 28000

B. $700

Step-by-step explanation:

7 0
3 years ago
PLS HELP OLL GIVE BRAINLIEST
Rudiy27

Answer:

yes they are the same

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Help ASAP please !! No scam I really need this<br> Trigonometry!!
USPshnik [31]
<h3>Answer:  Choice D)  7.5 cm</h3>

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

Explanation:

We are told that quadrilateral ABCD is similar to quadrilateral EFGH.

The order of the four letter sequence is important.

  • For ABCD, we have AB as the first pair of letters.
  • For EFGH, we have EF as the first pair of letters.

Therefore, AB and EF are corresponding sides.

So AB = 10 and EF = x pair up together. We can form the ratio AB/EF which becomes 10/x.

The diagram shows that AD = 8. Notice that A and D are the first and last letters of ABCD. The first and last letters of EFGH are E and H. We can see that AD and EH correspond to one another because of this.

AD = 8 and EH = 6 forming the ratio AD/EH = 8/6

Because the quadrilaterals are similar, the corresponding ratios must be the same. Therefore, AB/EF is the same as AD/EH.

-----------------------

Let's set up a proportion to solve for x

AB/EF = AD/EH

10/x = 8/6

10*6 = x*8

60 = 8x

8x = 60

x = 60/8

x = 7.5  Answer is choice D

6 0
3 years ago
3 = −2∣ 1 — 4 s − 5 ∣ + 3
artcher [175]

Answer:

s=1

Step-by-step explanation:

3=-2(1-4s-5)+3

3=-2+8s+10+3

3=8s+11

3-11=8s

8=8s

8/8=s

s=1

hope it helps you!!

3 0
3 years ago
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