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3 years ago

X+3<9 answer pls 2x+5<12

Mathematics

1 answer:

diamong [38]3 years ago

7 0

Answer:

first one: x<9 second: x<3.5 or 7/2

Step-by-step explanation:

first: substract 3 from both sides

second: substract 5 and then divide by 2

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Find the zeros of the function f(x)=2x^2-7x-30

ivanzaharov [21]

$2x^2-7x-30=0 \\ \\
a=2 \\ b=-7 \\ c=-30 \\
b^2-4ac=(-7)^2-4 \times 2 \times (-30)=49+240=289 \\ \\
x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}=\frac{-(-7) \pm \sqrt{289}}{2 \times 2}=\frac{7 \pm 17}{4} \\
x=\frac{7-17}{4} \ \lor \ x=\frac{7+17}{4} \\
x=\frac{-10}{4} \ \lor \ x=\frac{24}{4} \\
x=-\frac{5}{2} \ \lor \ x=6 \\
\boxed{x=-2.5 \hbox{ or } x=6}$

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3 years ago

Steve only puts quarters and dimes in his piggy bank. Right now, he has five more dimes than quarters in it, and the total is $7

LenKa [72]

Answer: 35x=73.85, comgining moving terms

divide both sides by 0.35

x=211 quarters, which is $52.75 ANSWER

x+5=216 dimes, which is $21.60 ANSWER

That total is $74.35

Step-by-step explanation:

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3 years ago

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WITCHER [35]

<em>I think its </em><em>A. translation, translation</em>

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3 years ago

What are the names to these quadrilaterals

olga_2 [115]

Answer:

The top left one is a pentagon, the lower left is a quadrilateral, the top right is a rhombus, and the bottom left is a parallelogram.

Step-by-step explanation:

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2 years ago

Read 2 more answers

Item 6 Your friend earns $10.50 per hour. This is 125% of her hourly wage last year. How much did your friend earn per hour last

tester [92]

Answer:

$8.40

Step-by-step explanation:

We can write a proportion to find the total amount last year using the information given. A proportion is two equivalent ratios set equal to each other.

$\frac{125}{100}=\frac{10.50}{y}$

We will cross multiply the numerator of one ratio with denominator of the other. And then solve for y.

125(y)=100(10.50)

125y=1050

y=8.40

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4 years ago