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Effectus [21]
3 years ago
7

Question: Expand 4(4k + 9)

Mathematics
1 answer:
lisabon 2012 [21]3 years ago
4 0

Answer:

16k + 36

Step-by-step explanation:

4(4k + 9)

(multiply everything in the bracket by 4 because that's whats surrounding the bracket)

4k * 4 + 9 * 4

16k + 36

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Please answer the question and give an explanation. Will give brainliest.
pentagon [3]

Step-by-step explanation:

By Pythagoras' Theorem, z^2 + (2.7)^2 = (4.2)^2.

This means that z^2 = (4.2)^2 - (2.7)^2 = 10.35.

So z = 3.2 (1 d.p.)

4 0
3 years ago
Read 2 more answers
The following system of equations is graphed below.
navik [9.2K]
One way is subsitute
I like solving

so

what you do is this
add the equaitons to gether to eliminate x

2y=x+5
<u>3y=-x-3 +</u>
5y=0x+2
5y=2
y=2/5

sub back


2y=x+5
2(2/5)=x+5
4/5=x+5
minus 5
4/5-25/5=x
-21/5=x

the point is (x,y) or
(-21/5,2/5)
aprox
(-4.2,0.4)
I think they wanted you to read the garph you should have attached and guess the answer
the closes one is
hmm, x=-3
and y=1

so then D is the answer

3 0
3 years ago
HELP ME PLZZZZZ ASAP
atroni [7]

Answer:

Irrational

Step-by-step explanation:

8 0
3 years ago
Essential: Solve the proportions<br> step by step ​
vazorg [7]

Answer:

The value of r=\frac{-106}{47}

The value of x=\frac{83}{32}

Step-by-step explanation:

Given that,

A) \frac{2r-2}{7r+10} = \frac{9}{8}

Now,

\frac{2r-2}{7r+10} = \frac{9}{8}

8(2r-2)=9(7r+10)

16r-16=63r+90

-16-90=63r-16r

-(16+90)=47r

-106=47r

r=\frac{-106}{47}

B) \frac{x+4}{9} = \frac{3(x-2)-1}{5}

Now,

\frac{x+4}{9} = \frac{3(x-2)-1}{5}

5(x+5)=9[3(x-2)-1]

5x+25=9[3x-6-1]

5x+25=9[3x-7]

5x+25=27x-63

25+63=27x+5x

83=32x

x=\frac{83}{32}

6 0
4 years ago
3х + у — z = 2<br> 2x – Зу – 2z = 1<br> 4х – у — Зz =0
Arisa [49]

Answer:

it is 3

Step-by-step explanation:

i got a 100 on the test

7 0
3 years ago
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