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3 years ago

Evaluate the expression when a = –1.4 and b = –2.7. |a| + b

Mathematics

2 answers:

s344n2d4d5 [400]3 years ago

6 0

For the first one the answer is B

QveST [7]3 years ago

5 0

It's 1.3 I took the test

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The Quadratic Formula gives which roots for the equation 2x2 + 7x = -2?

olya-2409 [2.1K]

Answer:

B. (-7 +/-√33) / 4

Step-by-step explanation:

2x2 + 7x + 2 = 0

x = [-7 +/- √(7^2 - 4*2*2)] / 2*2

x = -7/4 +/- √(33) / 4

= (-7 +/-√33) / 4

7 0

3 years ago

-5x+2y=6<br> -x+2y=-2 <br> what is the solution to the system of equations?

dybincka [34]

Step-by-step explanation:

$- 5x + 2y = 6 \\ - x + 2y = - 2 \\ \\ - 5x + 2y - ( - x + 2y) = 6 - ( - 2) \\ - 5x + 2y + x - 2y = 6 + 2 \\ - 4x = 8 \\ \frac{ - 4x}{ - 4} = \frac{8}{ - 4 } \\ x = (- 2) \\ \\ -5x + 2y = 6 \\ - 5 \times - 2 + 2y = 6 \\ 10 + 2y = 6 \\ 2y = 6 - 10 \\ 2y = - 4 \\ \frac{2y}{2} = \frac{ - 4}{2} \\ y = - 2 \\ now \: lets \: see \: whether \\ this \: equation \: is \: correct. \\ - x + 2y = - 2 \\ - ( - 2) + 2 \times - 2 = - 2 \\ 2 + 2 \times - 2 = - 2 \\ 2 - 4 = - 2 \\ - 2 = - 2 \\ yes \: this \: equation \: is \\ correct.$

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3 years ago

Can someone help me

goldfiish [28.3K]

Answer:

0,4,8,12,16

Step-by-step explanation:

so for the value of x- just substitute it into the equation

so -2

8+4(-2)

8-8=0

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3 years ago

If t=(23 -38 17 -6), then what is -10(t)? I WILL GIVE BRAINLIEST

laiz [17]

Answer:Piqued the same time.you should come over to the same time as before I have to take the

Step-by-step explanation:

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3 years ago

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BaLLatris [955]

Answer:66.6 but if round 67%

Step-by-step explanation:

Because 52 ÷78 =66.6

So it's 67%

5 0

3 years ago

Read 2 more answers