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3 years ago

Pls help due ASAP .....

Mathematics

2 answers:

Anon25 [30]3 years ago

8 0

A because equal them to each other

grigory [225]3 years ago

5 0

Answer:

Step-by-step explanation:

The angles are opposites, so they're congruent.

4x - 5 = 3x + 10

4x - 3x = 10 + 5

x = 15

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A triangle has sides of lengths 10, 24, and 26. is it a right triangle? explain

Stels [109]

Yes it's a right triangle. Using the Pythagoran
10^2 + 24^2 = 26^2

Thus it's a right triangle

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3 years ago

Write 11.183 million in standard form.

matrenka [14]

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3 years ago

Find an for the arithmetic series with s16 = -288 And a1 =-21

Maru [420]

If $d$ is the common difference between terms in the sequence $\{a_n\}$ , then

$a_1=-21$
$a_2=a_1+d=-21+d$
$a_3=a_2+d=-21+2d$
...
$a_n=a_{n-1}+d=\cdots=-21+(n-1)d$

You're told that $S_{16}=-288$ (the sum of the first 16 terms in the sequence, presumably). Well, we know that

$S_{16}=\displaystyle\sum_{n=1}^{16}a_n=\sum_{n=1}^{16}(-21+(n-1)d)$
$S_{16}=\displaystyle(-21-d)\sum_{n=1}^{16}1+d\sum_{n=1}^{16}n$

Recall that

$\displaystyle\sum_{n=1}^kn=\frac{k(k+1)}2$

so that we have

$-288=16(-21-d)+\dfrac{16(16+1)}2d\implies d=\dfrac25$

So we get

$\begin{cases}a_1=-21\\\\a_n=-21+\dfrac25(n-1)\end{cases}$

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3 years ago

What's the simplified form of 2x + 3 − x + 5?

scoundrel [369]

First, separate the x's and the numbers:
+2x and -x
+3 and +5

Next, solve those sums:
+2x - x = 1x = x
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Answer: A. x+ 8

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3 years ago

Read 2 more answers

A carpenter has to cut four lengths of wood, each 128cm long. What is the total length of wood that he needs?

Gennadij [26K]

Answer:

512cm

Step-by-step explanation:

same length of 128 4 times. 512

4 0

2 years ago