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4 years ago

Devaughn is 13 years older than Sydney. The sum of their ages is 77 . What is Sydney's age?

Mathematics

1 answer:

Tanya [424]4 years ago

6 0

77-13=64....64÷2=32 the age should be 32

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What is x when 2(x+3)=x-4

denpristay [2]

Answer:

$x=-10$

Step-by-step explanation:

First, use distribution to simplify

$2(x+3)=x-4\\2x+6=x-4$

Then, simplify further by combining like terms

$2x+6=x-4\\2x+10=x\\10=-1x$

Solve

$10=-1x\\x=-10\\$

8 0

3 years ago

What is -5/6 divided by 9/10? A. -27/25 B. -4/3 C. -3/4 D. -25/27

kakasveta [241]

$-\frac{5}{6}$ ÷ $\frac{9}{10}$

First, apply the rule (easiest way if you have learned it): $a$ ÷ $\frac{b}{c} = a$ × $\frac{c}{b}$
$- \frac{5}{6}$ × $\frac{10}{9}$
Second, apply the last rule: $\frac{a}{b}$ × $\frac{c}{d} = \frac{ac}{bd}$
$- \frac{5*10}{6*9}$
Third, multiply 5 × 10 to get 50.
$- \frac{50}{6*9}$
Fourth, multiply 6 × 9 to get 54.
$-\frac{50}{54}$
Fifth, find the GCF of 50 and 54.
The GCF should be 2.
Sixth, divide the numerator by the GCF.
$50$ ÷ $2 = 25$
Seventh, divide the denominator by the GCF.
$54$ ÷ $2 = 27$
Eighth, now put 25 and 27 together to get the simplified fraction.
$- \frac{25}{27}$

Answer as fraction: $-\frac{25}{27}$
Answer as decimal: 0.9259

7 0

3 years ago

Each week, Rosario drives to an ice-skating rink that is 60 miles away. The round-trip takes 2.75 hours. If he averages 55 miles

sertanlavr [38]

Answer:

60(55)•60x=2.75

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Can someone help me please I do not know the answer

Afina-wow [57]