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2 years ago

10

There are two mystery numbers. The sum of 7 times the first number and 5 times the second number is -11. The sum of 10 times the

first number and 8 times the second number is -20. What are the two numbers?

1 answer:

AlekseyPX2 years ago

8 0

First is 2, second is -5

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Which of the following is the number 0.008005 written in scientific notation?

Tcecarenko [31]

A. 8.005 • 10² = 800.5 (Incorrect)

B. 8.500 • 10⁻³ = 0.0085 (Incorrect)

C. 8.005 • 10⁻⁴ = 0.000801 (Incorrect)

D. 8.005 • 10⁻³ = 0.008005 (Correct)

Answer: D. 8.005 • 10⁻³

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2 years ago

What is 5 plus 6 minus 9

kap26 [50]

5+6 is 11 and 11-9 is 2
and also
6-9 is -3 and -3+5 is 2
so it is 2

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2 years ago

How many pints is 2 1/2 quarts

natima [27]

Answer:

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Step-by-step explanation:

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2 years ago

After which value of x does function g exceed function f

nalin [4]

We have that

for x=1
f(x)=1.5 and g(x)=-1
so
g(x) < f(x)

for x=2
f(x)=5 and g(x)=5
so
g(x)= f(x)

for x=3
f(x)=9.5 and g(x)=23
so
g(x) > f(x)

therefore

the answer is
<span>After x=2 function g exceeds function f</span>

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3 years ago

I've done the y = equations but I don't know how to do this one.

Tems11 [23]

Consider the equation

$-10x-y=-20$

1) First row of the table

Set x=0 and solve as follows:

$\begin{gathered} -10(0)-y=-20 \\ \Rightarrow-y=-20 \\ \Rightarrow y=20 \end{gathered}$

The answer is y=20 and the pair x-y is (0,20)

2) Second row

Set x=1 and solve, as follows:

$\begin{gathered} -10(1)-y=-20 \\ \Rightarrow-10-y=-20 \\ \Rightarrow-y=-10 \\ \Rightarrow y=10 \end{gathered}$

The answers are y=10 and (1,10)

3) Third row.

Set y=0 and solve as follows:

$\begin{gathered} -10x-(0)=-20 \\ \Rightarrow-10x=-20 \\ \Rightarrow x=\frac{20}{10}=2 \\ \Rightarrow x=2 \end{gathered}$

The answers are x=2 and (2,0)

6 0

6 months ago