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3 years ago

Help with this system of equations !! y = 3x + 21; y = -7x + 2

Mathematics

1 answer:

s2008m [1.1K]3 years ago

3 0

C) x = -19/10 because when solving it with substitution u get x=-19/10 & y=153/10

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What is the output value for the following function, f(x) = 5x - 2 if the input value is 3?

Zanzabum

F(x)=5x-2
y=5x-2
y=5(3)-2
y=15-2
y=13

so the answer is B. 13

8 0

2 years ago

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K + 4(5k +6) = - 123 <br> HELP ASAP

Anni [7]

Answer:

-7

Step-by-step explanation:

-123-(6x4=24)=-147 -147 divided by (4x5k+1k=21k)=-7

4 0

2 years ago

Factor completely.<br> 5x4 + 35x3– 150x2

Igoryamba

5x^4+35x^3-150x^2

5x^2(x-3) ---> (x+10)

3 0

2 years ago

These triangles are similar and the sides are proportional. Which proportion correctly describes the situation below?

Veronika [31]

Answer:

Option (3)

Step-by-step explanation:

"If two triangles are similar, their corresponding sides are proportional."

We will check each proportionality ratio given in the options for the given property,

Option (1),

$\frac{QB}{DM}=\frac{DF}{QL}=\frac{LB}{MF}$

$\frac{3.5}{2}=\frac{5}{8.75}=\frac{10.5}{6}$

$\frac{7}{4}=\frac{4}{7}=\frac{7}{4}$

But $\frac{7}{4}\neq \frac{4}{7}$ .

Therefore, this option is not the answer.

Option (2),

$\frac{FM}{LB}=\frac{BQ}{MD}=\frac{QL}{DF}$

$\frac{6}{10.5}=\frac{3.5}{2}=\frac{8.75}{5}$

$\frac{4}{7}=\frac{7}{4}=\frac{7}{4}$

But $\frac{4}{7}\neq \frac{7}{4}$ ,

Therefore, this option is not the option.

Option (3),

$\frac{BQ}{MD}=\frac{QL}{DF}=\frac{BL}{MF}$

$\frac{3.5}{2}=\frac{8.75}{5}=\frac{10.5}{6}$

$\frac{7}{4}=\frac{7}{4}=\frac{7}{4}$

Therefore, this option is the answer.

Option (4),

$\frac{6}{10.5}=\frac{2}{3.5}=\frac{5}{10.5}$

$\frac{4}{7}=\frac{4}{7}=\frac{10}{21}$

But, $\frac{4}{7}\neq \frac{10}{21}$

Therefore, this is not the correct option.

8 0

2 years ago

Annie found that 57 students in her school knew French and 23 of those students knew Spanish, as well. There were 11 students wh

V125BC [204]

Answer:

Table C is the correct option.

Step-by-step explanation:

We are given,

Number of students which knew French = 57

Number of students which knew both French and Spanish = 23

Number of students which knew Spanish but not French = 11

Number of students which knew neither French nor Spanish = 4

So, we get that,

Number of students not knowing French = 57 - 23 = 34

Hence, the table for the given situation is,

Knew Spanish Did not know Spanish Total

Knew French 23 34 57

Did not know French 11 4 15

Total 34 38 72

Thus, option C is correct.

7 0

3 years ago

Read 2 more answers