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Sergeeva-Olga [200]
3 years ago
8

Expand and simply x(2x + 3) + 5( x - 7)​

Mathematics
1 answer:
zalisa [80]3 years ago
6 0

Answer:

2x² + 8x - 35

Step-by-step explanation:

x(2x + 3) + 5(x - 7) ← distribute both parenthesis

= 2x² + 3x + 5x - 35 ← collect like terms

= 2x² + 8x - 35

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The following examples illustrate the commutative property of multiplication.
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4 years ago
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Algebra help needed!!
Leni [432]
The population triples ( P × 3 ) every ten minutes...

So if ten minutes is reached there will be 1,200 bacteria.

Edited - missed the question
** The units for time should be in minutes.

P = 400 × 3^(t/10)

at t = 0 ; P = 400
at t = 10 ; P = 1,200

When P = 600
600 = 400 × 3^(t/10)
6/4 = 3^(t/10)
Log(3/2) = Log(3^(t/10))
power rule
Log(3/2) = (t/10) Log(3)
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3.69 minutes the population will be at 600 bacteria
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6 0
3 years ago
It asks to simplify the expression​
Serggg [28]

Answer:

m^76

Step-by-step explanation:

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hope this helped :)

3 0
3 years ago
Is YZ tangent to circle x
inna [77]

<u>Given:</u>

The radius of the circle XY is XY = 11.4 in

The length of ZY is 15.2 in

The length of XZ is 19.6 in

We need to determine whether YZ is a tangent to the circle X.

<u>Is YZ tangent to the circle X:</u>

We shall determine whether YZ is a tangent to the circle X by using the Pythagorean theorem.

Thus, we have;

XZ^2=XY^2+YZ^2

Substituting the values, we have;

(19.6)^2=(11.4)^2+(15.2)^2

Simplifying, we get;

384.16=129.96+231.04

384.16\neq 361

Since, both sides of the equation are not equal, thus, YZ is not a tangent to the circle X.

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This is the graph that matches that

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