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zloy xaker [14]
3 years ago
9

1. What is the equation of the line that passes through (2, -1) and whose y-intercept is 5?

Mathematics
1 answer:
weqwewe [10]3 years ago
6 0
1. Selection B is the only equation satisfied by both (0, 5) and (2, -1).

2. Selection D is the only one with a slope of 5/2.
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Gabrielle's age is three times Mikhail's age. The sum of their ages is 84. What is Mikhail's age?
Whitepunk [10]

Answer: 21

Step-by-step explanation:

84 divided by 4 = 21 since grabielle is 21, and then mikhail is gonna be 3 times more so it’s gonna be 63

7 0
3 years ago
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What is 20precent in fraction
Rina8888 [55]
20% in fraction form is....
1) 20 is the percent
2)to put it in a fraction form.......
3) you need to divide it by 100.
4) 20 /100 equals 0.2
5) 0.2 says it's out of 2/10
6) if you want to simplify you can so go ahead: 2/10 >>> (turns into) 1/5
7) 1/5 is your answer...
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3 years ago
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Use the substitution method to solve the system of equations
PilotLPTM [1.2K]

You solve the substitution method to solve a system of equality by expressing one variable in terms of the other using one equation, and then plugging this expression in the other(s).

In this case, the first equation gives us a way to express n in terms of m. So, we can replace every occurrence of n in the second equation with the given formula.

The result is

14m+2n=-8 \iff 14m+2(-7m-4)=-8 \iff 14m-14m-8=-8 \iff -8=-8

So, the second equation turned to be an equality, i.e. an equation where both sides are the same.

This implies that the system has infinitely many solutions, because every couple (n,m) such that n=-7m-4 is a solution to the system, because it satisfies both equations: the first is trivially satisfied, whereas the second is an identity, and as such is satisfied by any value of the variable.

3 0
3 years ago
elsa is designing a commercial jet. she drew a model of her design using the scale shown below. According to her design what wil
stiv31 [10]

Answer:

55

Step-by-step explanation:

5 0
3 years ago
Easy question
Leviafan [203]
\dfrac{\mathrm dy}{\mathrm dt}=ky\iff\dfrac{\mathrm dy}y=k\,\mathrm dt

Integrating both sides, we get

\ln|y|=kt+C
\implies y=e^{kt+C}=e^{kt}e^C=Ce^{kt}

When t=0, we have y=10000, so that

10000=Ce^{0k}\implies C=10000

When t=4, we have y=8000, which means

8000=10000e^{4k}\implies k=\dfrac14\ln\dfrac{8000}{10000}\approx-0.0558
5 0
3 years ago
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