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sesenic [268]
3 years ago
9

2x + y = 93x - y = 16​

Mathematics
2 answers:
snow_tiger [21]3 years ago
7 0

Answer:

X=7 y=-5

Step-by-step explanation:

2x+y=9

3x-y=16

use the process of elimination finding out what works for one problem and try it on the other until they both work

Nesterboy [21]3 years ago
4 0

Answer:

x=5 y=-1

Step-by-step explanation:

5x=25

x=5

2(5)+y=9

10+y=9

y=-1

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A=s^2

A=6.3^2

(A=6.3x6.3)


And your answer would be:


A=39.69cm^2

4 0
3 years ago
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Alika [10]
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Read 2 more answers
Why is ac smaller than ad if they both look very close
kakasveta [241]

Let's begin by listing out the information given to us:

We start out by observing that Triangles MKR & ACD are similar or proportional

\begin{gathered} MK=21;AC=\text{?} \\ MR=24;AD=28\frac{4}{5} \\ KR=CD=\text{?} \end{gathered}

We will solve for the missing side by using the similar triangle theorem. This is shown below:~

\begin{gathered} \Delta MKR\approx\Delta ACD \\ \frac{MK}{AC}=\frac{MR}{AD} \\ \frac{21}{AC}=\frac{24}{28\frac{4}{5}} \\ \text{Cross multiply, we have:} \\ 24\cdot AC=28\frac{4}{5}\cdot21 \\ AC=\frac{28\frac{4}{5}\cdot21}{24}=25\frac{1}{5} \\ AC=25\frac{1}{5} \end{gathered}

8 0
1 year ago
√25 + √144 +√100<br>who know pls​
pychu [463]

Answer:

27

Step-by-step explanation:

√ 25 is 5

√ 144 is 12

√ 100 is 10

5 + 12 + 10 = 27

8 0
3 years ago
The sum of the first 15 terms of a geometric sequence with 7 as the first term and a common ratio of -3 is __________.
Andre45 [30]

Step-by-step explanation:

the formula for the sum of the first n terms of a geometric sequence is

Sn = s1(1 - r^n)/(1 - r)

with r being the common ratio and s1 is the first term.

so,

S15 = 7×(1 - (-3)¹⁵)/(1 - -3) = 7×(1 - -14,348,907)/4 =

= 7×14,348,908/4 = 7×3,587,227 = 25,110,589

4 0
2 years ago
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