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WITCHER [35]
3 years ago
10

a. If Mei has already earned 30 points, write and solve an addition equation to find the number of points she still needs.​

Mathematics
1 answer:
Lesechka [4]3 years ago
7 0

Answer:

x-30

Step-by-step explanation:

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Answer: 5000

Explanation: a^2+b^2=c^2

The variables a & b respresent the sides, while the variable c represents the hypotenus. (the longer line in the triangle)

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2 years ago
What is the measure of 21? 100° 90° 80° 85° 95%​
Scorpion4ik [409]

Answer:

A quadrilateral's interior angles have a sum of 360°.

Given that we have 85°, 100°, and 90°(the right angle), and an unknown angle.

We can add these angles plus the unknown angle to equal a total of 360°.

85 + 100 + 90 + x(our unknown missing angle) = 360

simplify

275 + x = 360

Isolate x by subtract 275 from both sides;

-275       -275

x = 85, ∠1 = 85°

We can also double check:-

85 + 100 + 90 + <u>85</u> = 360

360 = 360 which is correct.

8 0
2 years ago
Someone help me with this ples with steps
SSSSS [86.1K]

Answer:

x=\frac{21}{4}

y=\frac{21}{2}

Step-by-step explanation:

equation (1): \frac{1}{2} (2x+y)=\frac{21}{2}

equation (2): y=2x

solve the system by substitution

step1: sub (2x) for y in equation 1:

\frac{1}{2} (2x+y)=\frac{21}{2}

\frac{1}{2} (2x+2x)=\frac{21}{2}

step2: simplify the expression:

\frac{1}{2} (4x)=\frac{21}{2}

2x=\frac{21}{2}

(divide by 2 for both sides)

x=\frac{21}{4}

To find the value for y sub 21/4 for x in equation 2:

y=2x

y=2×(21/4)

y=\frac{21}{2}

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Which of the following is equal to 5.3?
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[4.6+2×(5_2)]÷2=7

4.6+2=4.8
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238÷2=116
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3 different groups of 2
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