All categories

3 years ago

X + 2y + 5z = -17 2x – 3y + 2z = -16 3x + y - z = 3

Mathematics

1 answer:

Tatiana [17]3 years ago

8 0

Answer:

first one : x=−2y−5z−17

2nd one: x= 3 /2 y−z−8

3rd one: x= −1 /3 y+ 1 /3 z+1

Step-by-step explanation:

You might be interested in

Number 21 please help me !!?!! ONLY THE QUESTION PLEASE

jenyasd209 [6]

Answer:

B: 5x+5.75

Step-by-step explanation:

2 cones with fruit:

cones= x+x=2x

fruit= $1 x 2=$2

=2x+ 2

3 cones with candy and syrup:

cones= x+x+x=3x

candy= $0.75x3=$2.25

syrup= $0.50x3=$1.50

3x+ (2.25+1.50)

=3x+3.75

both of them together=

(3x+3.75)+(2x+2)= 5x+5.75

4 0

2 years ago

Read 2 more answers

Solve for x to the nearest tenth. х 3 7 3 20 POINTS

lesya [120]

Answer:1.7

Step-by-step explanation:

8 0

3 years ago

Andrew can paint the neighbor's house 6 times as fast as The year and worked together, it took them 5 days. How long would it

Rina8888 [55]

Answer: $\dfrac{35}{6}\ \text{days},\ 35\ \text{days}$

Step-by-step explanation:

Given

Andrew can paint times faster than the other

Suppose the other person take 6x days

So, andrew takes only x days to paint alone

When they work together, it took them 5 days i.e.

$\Rightarrow \dfrac{1}{x}+\dfrac{1}{6x}=\dfrac{1}{5}\\\\\Rightarrow \dfrac{6+1}{6x}=\dfrac{1}{5}\\\\\Rightarrow x=\dfrac{35}{6}\ \text{days}$

So, time taken by the to finish individually is given by

$\Rightarrow \text{Andrew= }\dfrac{35}{6}\ \text{days}\\\\\Rightarrow \text{Other Person}=6\times \dfrac{35}{6}\\\\\Rightarrow \text{Other Person}=35\ \text{days}$

5 0

3 years ago

What does the value of y have to be so that (3, y) and (-5,6) have a slope of -1 between them?

Natasha_Volkova [10]

Answer:

y= -2

Step-by-step explanation:

Please see attached picture for full solution.

(From the 4th to 5th line, I multiplied both sides by 8)

3 0

3 years ago

Angie and Brian are running a bakery. They are going to make three kinds of banana bread: regular, one with extra sugar, and one

dolphi86 [110]

Answer:

150 regular loaves

125 loaves with extra sugar

100 loaves with extra bananas.

Step-by-step explanation:

Let R represent loaves of regular bread, S represent loaves with extra sugar, and B represent loaves with extra bananas. If they have 1200 bananas, 1050 cups of sugar, and 1075 cups of flour available, the number of each type of bread that Angie and Brian can make are given by the following system of equations:

$3R+2S+5B=1,200\\3R+4S+1B=1,050\\2R+3S+4B=1,075$

Solving the linear system:

$3R+4S+1B-(3R+2S+5B)=1,050-1,200\\2S-4B=-150\\S=-75+2B\\\\3R+2*(-75+2B)+5B=1,200\\2R+3*(-75+2B)+4B=1,075\\3R+9B=1,350\\2R+10B=1,300\\\\3R+9B-1.5*(2R+10B)=1,350-(1.5*1,300)\\9B-15B=-600\\B=100\\2R+10*100=1,300\\R=150\\3*150+2S+5*100=1,200\\S=125$

They should make 150 regular loaves, 125 loaves with extra sugar, and 100 loaves with extra bananas.

7 0

3 years ago